UltrAspire Alpha 4.0 Vest vs Nathan Intensity Womens Hydration Backpack

The main difference between the UltrAspire Alpha 4.0 Vest and the Nathan Intensity Womens Hydration Backpack is that the Alpha 4.0 Vest has Zippers (Large zipper pulls) while the Intensity Womens Hydration Backpack does not.

Ultraspire Alpha 4.0 Vest FRont View
Nathan Intensity Womens Hydration Backpack Front View
Specs Brand UltrAspire Nathan
Name Alpha 4.0 Vest Intensity Womens Hydration Backpack
Category Sports Sports
Sub Category Running Running
Capacity (L) 6L 4.4L
Dimensions (in) 31-36 13 x 7 x 3
Weight (lb) 0.6 0.9
Fabric Double layered 30D Fabric Nylon / Polyester
Color Emerald Blue Lime Very Berry
Warranty UltrAspire Warranty/Return Policy
Release Date July 5, 2019 March 11, 2021
Rating 4.5 4.6
Price Under $125 Under $100
General Features Shoulder Straps Angled and curved shoulder straps Breathable wall mesh shoulder straps
Sternum / Chest Straps Adjustable chest straps
Zippers Large zipper pulls
Main Compartment Access Normal zipped access
External Pockets Rapid access pockets, passage pocket and drawstring pocket Front zipped phone pocket and bottle pocket
Internal Compartments Internal rear stash pocket and key ring clip
Water Bottle Yes Yes
Handles Top grab handle Top grab handle
Loops and Attachments Patented 3-way propulsion harness™
Hiking / Backpacking Features Ergonomic ErgoFit
Ventilated Back Ultracool system
Trekking Pole Holders Trekking pole attachments
Reflective Safety Strips Reflective trims
Hydration Features Bladder Size Holds 2L reservoir Includes 2L water bladder with bite valve
Hydration Compatible Yes Yes
Other Features Other Features Bounce-free ride for your run or hike, designed specifically to fit the female form

You're currently comparing the Alpha 4.0 Vest by UltrAspire against the Intensity Womens Hydration Backpack by Nathan .


UltrAspire 's Alpha 4.0 Vest is a Sports backpack with Running features while Nathan 's Intensity Womens Hydration Backpack is a Sports backpack with Running features.

The UltrAspire Alpha 4.0 Vest has a capacity of 6L (liters), weighs 0.6 pounds and it's dimensions in inches are 31-36. It's made of Double layered 30D Fabric and is available in Emerald Blue Lime in comparison the Nathan Intensity Womens Hydration Backpack's capacity is 4.4L with a size of 13 x 7 x 3 inches. Constructed from Nylon / Polyester it weighs 0.9 pounds and is available in Very Berry.