Osprey Siskin 8 Hydration Backpack vs Osprey Radial Bike Commute Backpack

The main difference between the Osprey Siskin 8 Hydration Backpack and the Osprey Radial Bike Commute Backpack is that the Siskin 8 Hydration Backpack has Compression Straps (External compression straps) while the Radial Bike Commute Backpack does not.

Osprey Siskin 8 Hydration Backpack Front View
Osprey Radial Bike Commute Backpack Front View
Specs Brand Osprey Osprey
Name Siskin 8 Hydration Backpack Radial Bike Commute Backpack
Category Hydration Commuter
Sub Category Outdoor Everyday
Capacity (L) 8L 34L
Dimensions (in) 18.5 x 8.5 x 6.9 20.49 x 13.79 x 11.82
Weight (lb) 1.2 3.3
Fabric 900x600D Polyester 210D Nylon Dobby
Color 3 colors and patterns 3 colors and patterns
Warranty Osprey Lifetime Warranty Osprey Lifetime Warranty
Release Date December 5, 2018 July 31, 2019
Rating 4.8 4.6
Price Under $100 Under $200
General Features Shoulder Straps Adjustable shoulder straps Adjustable shoulder straps
Sternum / Chest Straps Adjustable sternum strap with magnetic valve Adjustable sternum strap with safety whistle
Hip Belt / Waist Strap Webbing hipbelt
Main Compartment Access Full front zipped access Normal zipped access
External Pockets Top zipped pocket Scratch-free zippered pocket and 2 side zipped pockets
Internal Compartments Internal scratch-free slash pocket Document sleeve and internal organization
Side Pockets Side pockets can fit water bottle and other accessories
Water Bottle No Yes
Handles Top grab handle Top grab handle
Loops and Attachments LidLock helmet attachment, ;oop for blinky light attachment LidLock helmet carry, blinker light attachment
Business & School Features Laptop Sleeve Padded laptop sleeve fits up to 15"
Organizer Pocket Front organization pocket
Travel Features Compression Straps External compression straps
Hiking / Backpacking Features Back Panel Mesh-covered extra deep ridged foam with center air channel Airspeed back panel
Rain Cover Built-in raincover
Ventilated Back Mesh-covered die-cut foam for ventilation
Reflective Safety Strips Reflective accent Reflective prints and zipper pulls
Gym / Sports Features Laundry Pocket Separate compartment for dirty clothes or shoes
Hydration Features Bladder Size Includes Osprey Hydraulics LT 2.5L reservoir by Hydrapak
Hydration Compatible Yes

You're currently comparing the Siskin 8 Hydration Backpack by Osprey against the Radial Bike Commute Backpack by Osprey .


Osprey 's Siskin 8 Hydration Backpack is a Hydration backpack with Outdoor features while Osprey 's Radial Bike Commute Backpack is a Commuter backpack with Everyday 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 Radial Bike Commute Backpack's capacity is 34L with a size of 20.49 x 13.79 x 11.82 inches. Constructed from 210D Nylon Dobby it weighs 3.3 pounds and is available in 3 colors and patterns.