Short mountain bike rides don’t require you to bring a bag with you. But for longer rides over half an hour, a hydration pack is necessary not just for storing water but other essentials such as food, tools, spares, and layers. Hydration backpacks come in all sizes and shapes, which leaves many people wondering: how do you choose the best one?
The best hydration backpack for mountain biking should have efficient airflow as well as adequate capacity for your water and gear. A 3-liter reservoir will do the job for most rides, but you can go up to 15 if you need to bring more along with you.
Having said that, there are other factors to consider in order for you to choose the best mtb hydration backpack for your specific riding needs. Read on to learn more.
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How to Choose the Best MTB Hydration Backpack
Hydration packs are a necessary accessory for mountain biking. They allow you to easily sip water from a tube instead of reaching for your water bottle, which in turn enables you to stay hydrated, especially on longer rides. Aside from that, they are also handy for keeping some other extras you may need such as a pump, spare tube, and more.
Choosing a hydration pack that best suits your needs is a personal preference. They come in a variety of designs, shapes, and sizes to accommodate bikers with different requirements or lifestyles. There are some things to consider:
Size
The length of your ride and the number or size of items you plan to bring should determine the size of your pack. For short rides under two hours that require nothing more than water or snacks, then you’re good with a small pack of under 3 liters.
Now, for longer days riding, it’s best to consider those with lots more capacity. You may need a hydration backpack that has anywhere from 9 to 18 liters, which is plenty of space for extra layers, food, a repair kit, and tools.
Hydration packs on the bigger end of the scale can carry as much as 3 liters of water on top of other essentials you’re bringing in them. However, packs over 20 liters in size are too big and can affect your stability on the bike, so you may want to keep this in mind when shopping around.
Ventilation
Proper ventilation is a critical feature of any hydration backpack, regardless of its price. Airflow and breathability in the back panel and shoulder straps are needed to prevent excessive sweating.
When you lose water through sweat during a bike ride, this will increase the risk of dehydration. Furthermore, when sweat accumulates on your back due to the lack of good airflow, this will make your bike ride uncomfortable.
Water capacity
When determining the appropriate capacity to choose out of a water reservoir, remember that water, or any liquid you decide to fill the bladder with, translates to weight. Each liter of liquid will add around 2 pounds of weight. With this in mind, you also need to balance it out with your needs to make sure you never run out of water on the trails.
As a general rule of thumb, most riders will need to drink around 22 ounces of water for every hour of riding. Again, this is a personal choice; some people simply need more water than others. Also take into consideration the difficulty of your ride and the weather, because during a harder ride in hot weather, you’ll need more water than usual.
Depending on the water hydration system you choose, some are designed with fill lines to help you as a guide.
Gear capacity
Hydration packs in the market present numerous options when it comes to gear capacity. Deciding how much gear to bring along is another personal decision because, while some riders can survive a few hours out with nothing more than a water bladder and protein gels, others will need more substantial food and gear.
The same will apply to the kind of spare parts or tools that you’ll bring along with you. There will be some people who prefer to ride with a complete suite of tools and spare clothes, while others can ride with just a pump and tire plug. Remember that the more gear you’ll need to bring, the more fabric and more weight you’ll have to carry around - and when it comes to mountain biking, packing a backpack that is as light as possible while having all your essentials is important.
If you are leaning towards a larger pack in order to have more space for gear, it’s also helpful to think about how all that capacity will be organized. A hydration backpack with a simple design allows you to stuff everything into one spacious pocket, while other designs are equipped with several compartments for better organization. It’s always recommended to go with packs designed with accessible and easy-to-use pockets so that you don’t waste time looking for what you need.
Fit
A lot of hydration packs out there offer a customizable fit. Several models even offer small, medium, and large sizing options, so you can purchase one with the best possible fit for your comfort.
Before you buy a hydration backpack for mountain biking, measuring your waist and torso is always recommended. If you can’t try on a pack before purchasing because you’re shopping online, go with a brand that offers hassle-free exchange or return policies.
Features
After deciding on the essentials, there are other features you may want to have in your hydration pack. Some recommended features include the following:
- Helmet attachment: Helmets are a bulky but essential accessory. Several mountain biking backpacks nowadays offer a helmet attachment option outside the pack, allowing you to easily clip it on when you aren't riding. It will also save you space, as opposed to packing it inside.
- Bite valve: Not all bite valves are created equally. The bite valve, where you sip water from a water bag, should seal properly when not in use. Look for leak-proof bite valves, as well as those that are easy to clean.
Best Hydration Backpacks for Mountain Biking
Finding the best hydration backpacks for mountain biking and cycling can take up a lot of time. Below are several recommended products that are appropriate for different mountain biking needs. Read the review below to have a better understanding of the pros and cons for each.
Best All Around Pack
CamelBak M.U.L.E. 12 Hydration Pack 100 oz. : The CamelBak M.U.L.E. is easily the most famous line of mountain biking backpacks in the world. The series was first introduced in 1995, and since then, CamelBak has continued to reinvent and innovate hydration bags that are trusted by bikers worldwide. The brand has made a name for itself by using cutting-edge designs for comfort and function, which separates them from the rest.
The CamelBak M.U.L.E. 12 Hydration Pack is a popular version of their all-around hydration packs. It has undergone several improvements through the years, with the latest iterations focused on a better, snug fit so that riders can enjoy more comfortable rides. These include a detachable stability belt, an overflow pocket, and a Magnetic Tube Trap which allows you to store the drinking tube in just one click.
This M.U.L.E. is the ideal size for long-distance rides; it weighs 27.5 ounces and has dimensions of 18.5 x 8.25 x 2.5 inches. It’s recommended for individuals with torso sizes between 15 to 19 inches. When it comes to storage, this pack can accommodate 9L of gear plus 3L of water.
No matter how long your journey takes, rides are breezy and comfortable thanks to the 3D vent mesh harness. During our testing, we were pleased to see how lightweight it truly is. The AirSupport Back Panel, which CamelBak designed with Body Mapping Technology to identify and ventilate the warmest parts of your pack, is an extremely convenient and effective feature on hot days as well.
If you need to keep an extra layer of clothing, you can store it in the Stretch Overflow Pocket. Meanwhile, your repair kit and bike tools can be neatly arranged in integrated carry pockets. CamelBak stands by all its products and offers a Lifetime Warranty, too – which covers all manufacturing defects.
It would have been better if this hydration backpack came with clearer instructions about closing the bladder, because it may take most people a few tries until they realize that you have to turn it counterclockwise and wait for a click. CamelBak could also strengthen the durability of the shoulder straps, which tend to feel pretty flimsy.
Despite that, the CamelBak M.U.L.E. 12 Hydration 100 oz backpack has no dealbreakers or serious design flaws. This is a great buy, a functional and useful hydration backpack that will last you a long time.
Best For Women
Osprey Sylva 12: For women who are passionate about mountain biking and enjoy roughing it up, you need a hydration backpack that’s reliable and up for the challenge. The Osprey Sylva 12 is a women’s hydration pack that can withstand the abuse of rugged use while holding up to different environments beautifully.
Weighing just 1.63 lbs., the Sylva is lightweight and boasts superior breathability. Its dimensions are 16.9 x 10.4 x 8.7 inches, but while other lightweight backpacks lack proper organizational features, this one doesn’t. There are pockets located in the front and side plus mesh compartments to neatly pack away small tools and items, while a detachable high-visibility rain cover keeps the pack dry.
Osprey’s backpacks are always well-designed, and the Sylva is no different. They include a LightWire frame to reduce weight on your shoulders and redistribute it to the hips. The tensioned back panel does a great job of reducing sweat, which we confirmed during our testing.
While it is a very effective hydration pack, the Sylva 12 also works well as a travel or city backpack for active women. Off the trails, this pack performs well for all-day sightseeing trips, boat trips, hiking, and walking. There are many wonderful features to appreciate in this hydration pack, though we do appreciate how comfortable and light it feels even if it’s packed with a full load.
That said, the Osprey Sylva 12 could still use some improvements in the future. Smaller, easy-access pockets outside would have been nice for keeping a mobile phone. The side pockets also can be challenging to place water bottles in.
Despite that, there are many reasons the Sylva 12 is perfect for women with active lifestyles and a variety of outdoor hobbies. The women-specific fit is outstanding, and the sleek profile is fantastic for riding.
Most Durable
Evoc FR Enduro Blackline 16L: Evoc’s line of athletic bags as well as protective gear never ceases to amaze. Customers can trust their extensive knowledge when it comes to backpacks that are highly functional and durable.
The Evoc FR Enduro Blackline 16L is renowned for its longevity and ability to withstand various trail and biking conditions, perfect for endurance riders. Constructed out of tough PU-coated ripstop nylon combined with tarpaulin, this pack is definitely built to last. It’s water-resistant too: all the features you need in a hydration backpack while remaining lightweight at just 1050 grams.
The storage capacity of 16L is ideal for minimalists who are going on overnight tours, but it also has ample room for long rides. There are three sizes available: small, medium/large, and extra-large; weights start at 1050 grams for the small size.
Evoc takes pride in the world-class breathability and protection offered by this backpack. The Liteshield back protector can absorb up to 95% of shocks and falls without sacrificing flexibility. The Enduro also features the Liteshield System Air, a proprietary design that combines back protection with the best possible ventilation, not seen in many other hydration backpacks for cycling.
While there are many excellent features to appreciate in this backpack, our research reveals that the durability as well as outstanding comfort offered by this pack is unbeatable. Whereas many other hydration backpacks have to cut corners in function, the Evoc FR Enduro Blackline 16L is a champion in this department. We believe that’s largely due to the engineering and technology Evoc invests in, such as the AIRO FLEX fabric and others mentioned here, which effectively transfer weight from the back to the hips while promoting breathability.
Another convenient detail is the tool pouch, which has a wide opening for easy access. There is also a pocket for everything you need on the trail: a lined pocket for your sunglasses, elastic side pockets for other gear, a helmet attachment system, stowable protection gear, and a key holder. The separate hydration compartment can keep a 3L bladder, and it’s useful that it already comes with a hydration clip.
In the event of a crash, Evoc offers a free protector crash replacement for all their Protector products. The Evoc FR Enduro Blackline is a very versatile choice, too: it can be used for skiing, hiking, and even traveling. It's a bit pricey, but it’s worth the investment if you’re a serious outdoor enthusiast.
Best Minimalist
Patagonia Dirt Roamer Bike Pack 20L: Patagonia’s Dirt Roamer line of products is dedicated to minimalist adventurers who want to take only the essentials. It’s for the bikers, hikers, and climbers who want to focus on bringing just what's important.
The Dirt Roamer Bike Pack follows the same design philosophy. It’s available in small/medium as well as large/extra-large, so you can find a pack no matter what your size is. The backpack is made from rugged 100% recycled nylon fabric, which has impressed us with its durability and longevity.
Despite being minimalist, the Dirt Roamer is exceptional when it comes to comfort. Your shoulders and neck will feel little to no pressure because Patagonia integrated their effective Regulator air mesh in the shoulder straps, even if there is minimal padding. Airmesh is also found in the padded hip belt, and our testing confirms that this feature works very well in distributing weight.
Sip away and hydrate with ease: the 2L HydraPak water pack is easy to use and convenient. The reservoir is located in the side-access sleeve for fuss-free drinking on the trails. It is worth noting that this hydration pack has a roll-top design, which we find very convenient though, understandably, it isn’t for everyone.
The 20L storage space of the Dirt Roamer offers enough room for carrying enough food, tools, and a jacket. There is a lack of pockets and a helmet clip, but again, this is a minimalist yet modern pack. The weight is just 1 lb. and 8 oz.; it would weigh significantly more if Patagonia had added compartments.
The Patagonia Dirt Roamer Bike Pack 20L will set you back around $150, so it may not be the most affordable, but it’s highly functional. We could have made use of a few pockets here and there, but it was not a deal breaker.
Best Waterproof
Mission Workshop Hauser 14L: For mountain bikers and cyclists who need a weatherproof backpack, look no further than the Mission Workshop Hauser 14L. This pack can literally be used in all kinds of weather conditions, so you can have the security and peace of mind that your valuables are always dry.
This unique hydration pack is made from world-class materials and design. At first glance, this pack looks rugged. The main compartment is accessible by a top flap that opens up to a roll-top closure for easy packing and unpacking.
You can choose from three types of advanced, modern materials: MultiCam Black Cordura, Dimension Polyant X-Pac, and HT500. These fabrics are not common in mountain biking backpacks but they are among a newer breed of tough, durable materials. Each backpack is already equipped with an internal tool roll, which is removable.
When we tested the pack, we found the perforated shoulder straps and back panel to be a nice touch. They were truly comfortable to wear even when the backpack was fully loaded and on long rides. The light frame sheet helps provide structure and stability to the pack as well.
The Mission Workshop Hauser 14L doesn’t come with its own hydration reservoir, though it is compatible with most models in the market up to 3L. They are best used with hydration bladders from CamelBak, Platypus, Nalgene, Osprey, and Hydrapak.
The bag’s dimensions are 9.5 x 20 x 5.5 inches, and it has a total volume of 14L. The pack weighs 2.1 lbs., so it’s spacious and compact enough for long trail adventures. Additionally, four weatherproof pockets outside the pack are a fantastic touch too!
If there was one minor design flaw, it’s the fact that it’s rather time-consuming to unload the pack, since one would have to open the clips first. It’s recommended to make use of the hook and loops instead to save time.
Mission Workshop’s prices are not cheap. The Hauser will set you back $280, but keep in mind that their products are well-built and designed to last a lifetime. Only the best materials, performance, and construction can be expected – and you won’t be disappointed.
Best For Organization and Storage
Osprey Raptor 14: Compact and slim, yet spacious and well-organized: that’s the Osprey Raptor 14. This hydration backpack is the bag of choice for seasoned mountain bikers and adventure enthusiasts who only want the very best when it comes to function and organization.
Osprey has integrated many remarkable features into this pack, but the wing-shaped shoulder straps are among the best. These unique shoulder straps are unlike any other you may have tried; they hug the body just right as you ride without getting in the way. That, combined with the AirScape suspension system and ergonomic back panel, supports riders with incredible comfort and stability.
The Osprey Raptor 14 is top-notch with organization and storage; it’s clear that each pocket has a very specific purpose and is well thought out. The stretchy shove-it pocket, located in the outer panel, is great for storing small accessories, an extra layer, and your GPS or other bulky gear. A zippered pocket can be found at the bottom of the pack, which contains a roll-out tool compartment.
Inside the pack, there is a zippered compartment featuring smaller pockets plus a key clip. Other fantastic pockets you’ll find in the Raptor include a clamshell zippered opening for the main compartment, a flap panel for equipment, and a lined pocket on top of the pack for your mobile phone or sunglasses – among others. The addition of compression straps was a nice touch, too: these help a lot in cinching down the pack from the sides and top when you need to ride with less.
Additionally, the pack has a 2.5L hydration reservoir, which is easy to sip from because of the direct-zip hose access, even as you ride. The Lidlock feature offers easy helmet attachment outside the pack.
Osprey utilized 210D Nylon Diamond Ripstop material in the pack construction. This fabric is durable and light, while the ventilated foam used in the harness and back panel doesn’t hinder movement at all. The sternum strap designed with magnetic buckles is a thoughtful touch, allowing you to single-handedly open or close it.
Our testing reveals that the Osprey Raptor 14 is the best option for riders who prioritize storage and organization. While it is certainly breathable, has all the right features and no frilly ones, and is affordable, you can expect to experience sweat build-up if you use this pack for hours during hot, humid days. Other than that, this hydration backpack is highly recommended.
Frequently Asked Questions
How much water should you drink while mountain biking?
Drink enough water based on the difficulty of the ride, how hot it is, and your body’s personal needs. On average, a 150-pound cyclist should consume a 16-ounce bottle of water each hour when riding in cool weather.
It helps to hydrate before you start riding, which helps you prevent getting dehydrated on the road. Ideally, drink 12 to 16 ounces of water three or four hours before you get on the bike. Then sip another 12 ounces two hours before.
Sip more water within the first hour of finishing your ride in order to replace lost fluids. Since people sweat differently, the best way to determine how much you should hydrate is to weigh yourself on a scale before and after a hard ride. If you weigh more after a cycle, reduce your water intake since this can lead to overhydration, but if you weigh less, drink more.
Can you put a hydration pack inside a regular backpack?
A regular backpack can be turned into a hydration pack as long as you know how to install a hydration bladder . The main reason mountain bikers use a bladder is for them to be able to efficiently drink their chosen fluids during a ride, whether it’s water or energy drinks. For this reason, hydration bladders are designed with a rubber tube attached, and the tube exit is at the bottom because it relies on gravity for you to sip liquid out of it.
To use a hydration pack inside a regular backpack, place it on one of the exterior side pockets or any large pocket that is snug enough. The hose exit should be placed on the bottom, then use a chest harness to clip the bladder in place. Give it a few tries to make sure that the liquid gets to your mouth without any knots or twists.
Conclusion
The best hydration backpack for mountain biking is one that fits you best, has ample space for water, and is comfortable and breathable. This guide provides you with the key points to consider the next time you shop around for one.