The main difference between the Osprey Ultralight Stuff Backpack and the Osprey Siskin 8 Hydration Backpack is that the Ultralight Stuff Backpack has Side Pockets (Side pockets can fit water bottle ) while the Siskin 8 Hydration Backpack does not.
Specs | Brand | Osprey | Osprey |
Name | Ultralight Stuff Backpack | Siskin 8 Hydration Backpack | |
Category | Hiking | Hydration | |
Sub Category | Daypack | Outdoor | |
Capacity (L) | 18L | 8L | |
Dimensions (in) | 17 x 9 x 7 | 18.5 x 8.5 x 6.9 | |
Weight (lb) | 0.2 | 1.2 | |
Fabric | 40D Nylon Ripstop | 900x600D Polyester | |
Color | 4 colors and patterns | 3 colors and patterns | |
Warranty | Osprey Lifetime Warranty | Osprey Lifetime Warranty | |
Release Date | May 30, 2015 | December 5, 2018 | |
Rating | 4.6 | 4.8 | |
Price | Under $50 | Under $100 | |
General Features | Shoulder Straps | Breathable mesh shoulder straps | Adjustable shoulder straps |
Sternum / Chest Straps | Adjustable sternum strap with magnetic valve | ||
Main Compartment Access | Normal zipped access | Full front zipped access | |
External Pockets | 1 zipped top pocket and 2 side pockets | Top zipped pocket | |
Internal Compartments | Internal scratch-free slash pocket | ||
Side Pockets | Side pockets can fit water bottle | ||
Water Bottle | Yes | No | |
Handles | Top grab handle | Top grab handle | |
Loops and Attachments | LidLock helmet attachment, ;oop for blinky light attachment | ||
Travel Features | Packable / Foldable | Folds into its built-in storage pocket | |
Compression Straps | External compression straps | ||
Hiking / Backpacking Features | Back Panel | Mesh-covered extra deep ridged foam with center air channel | |
Reflective Safety Strips | Reflective accent | ||
Hydration Features | Bladder Size | Includes Osprey Hydraulics LT 2.5L reservoir by Hydrapak | |
Hydration Compatible | Yes |
Osprey 's Ultralight Stuff Backpack is a Hiking backpack with Daypack features while Osprey 's Siskin 8 Hydration Backpack is a Hydration backpack with Outdoor features.
The Osprey Ultralight Stuff Backpack has a capacity of 18L (liters), weighs 0.2 pounds and it's dimensions in inches are 17 x 9 x 7. It's made of 40D Nylon Ripstop and is available in 4 colors and patterns in comparison the Osprey Siskin 8 Hydration Backpack's capacity is 8L with a size of 18.5 x 8.5 x 6.9 inches. Constructed from 900x600D Polyester it weighs 1.2 pounds and is available in 3 colors and patterns.
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