The main difference between the Osprey Siskin 8 Hydration Backpack and the Osprey Ultralight Stuff Backpack is that the Siskin 8 Hydration Backpack has Sternum / Chest Straps (Adjustable sternum strap with magnetic valve) while the Ultralight Stuff Backpack does not.
Specs | Brand | Osprey | Osprey |
Name | Siskin 8 Hydration Backpack | Ultralight Stuff Backpack | |
Category | Hydration | Hiking | |
Sub Category | Outdoor | Daypack | |
Capacity (L) | 8L | 18L | |
Dimensions (in) | 18.5 x 8.5 x 6.9 | 17 x 9 x 7 | |
Weight (lb) | 1.2 | 0.2 | |
Fabric | 900x600D Polyester | 40D Nylon Ripstop | |
Color | 3 colors and patterns | 4 colors and patterns | |
Warranty | Osprey Lifetime Warranty | Osprey Lifetime Warranty | |
Release Date | December 5, 2018 | May 30, 2015 | |
Rating | 4.8 | 4.6 | |
Price | Under $100 | Under $50 | |
General Features | Shoulder Straps | Adjustable shoulder straps | Breathable mesh shoulder straps |
Sternum / Chest Straps | Adjustable sternum strap with magnetic valve | ||
Main Compartment Access | Full front zipped access | Normal zipped access | |
External Pockets | Top zipped pocket | 1 zipped top pocket and 2 side pockets | |
Internal Compartments | Internal scratch-free slash pocket | ||
Side Pockets | Side pockets can fit water bottle | ||
Water Bottle | No | Yes | |
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 Siskin 8 Hydration Backpack is a Hydration backpack with Outdoor features while Osprey 's Ultralight Stuff Backpack is a Hiking backpack with Daypack features.
The Osprey Siskin 8 Hydration Backpack has a capacity of 8L (liters), weighs 1.2 pounds and it's dimensions in inches are 18.5 x 8.5 x 6.9. It's made of 900x600D Polyester and is available in 3 colors and patterns in comparison the Osprey Ultralight Stuff Backpack's capacity is 18L with a size of 17 x 9 x 7 inches. Constructed from 40D Nylon Ripstop it weighs 0.2 pounds and is available in 4 colors and patterns .
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