Osprey Atmos AG 50 Mens Backpacking Backpack vs Osprey Siskin 8 Hydration Backpack

The main difference between the Osprey Atmos AG 50 Mens Backpacking Backpack and the Osprey Siskin 8 Hydration Backpack is that the Atmos AG 50 Mens Backpacking Backpack has Hip Belt / Waist Strap (Fit-on-the-Fly hipbelt with pockets) while the Siskin 8 Hydration Backpack does not.

Osprey Atmos AG 50 Mens Backpacking Backpack Front View
Osprey Siskin 8 Hydration Backpack Front View
Specs Brand Osprey Osprey
Name Atmos AG 50 Mens Backpacking Backpack Siskin 8 Hydration Backpack
Category Mens Hydration
Sub Category Backpacking Outdoor
Capacity (L) 50L 8L
Dimensions (in) 32.68 x 14.96 x 15.35 18.5 x 8.5 x 6.9
Weight (lb) 4.2 1.2
Fabric 100D X 630D Nylon Dobby 900x600D Polyester
Color 3 colors and patterns 3 colors and patterns
Warranty Osprey Lifetime Warranty Osprey Lifetime Warranty
Release Date August 15, 2015 December 5, 2018
Rating 4.7 4.8
Price Under $250 Under $100
General Features Shoulder Straps Adjustable shoulder straps Adjustable shoulder straps
Sternum / Chest Straps Sternum strap with integrated safety whistle Adjustable sternum strap with magnetic valve
Hip Belt / Waist Strap Fit-on-the-Fly hipbelt with pockets
Main Compartment Access Top loading access Full front zipped access
External Pockets Front stretch mesh pocket and 2 stretch mesh 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 Web attachment points, dual ice tool loops, Stow-on-the-Go trekking pole attachment, integrated FlapJacket LidLock helmet attachment, ;oop for blinky light attachment
Travel Features Compression Straps External compression straps External compression straps
Stowable Straps Removable sleeping pad straps
Hiking / Backpacking Features Back Panel Innovative AntiGravity suspension Mesh-covered extra deep ridged foam with center air channel
Internal / External Frame LightWire-tensioned, full peripheral frame comfortably transfers pack load
Ventilated Back Yes
Hip Belt Pockets Yes
Top / Floating Lid Yes
Trekking Pole Holders Yes
Reflective Safety Strips Reflective accent
Hydration Features Bladder Size Holds 3L hydration reservoir Includes Osprey Hydraulics LT 2.5L reservoir by Hydrapak
Hydration Compatible Yes Yes

You're currently comparing the Atmos AG 50 Mens Backpacking Backpack by Osprey against the Siskin 8 Hydration Backpack by Osprey .


Osprey 's Atmos AG 50 Mens Backpacking Backpack is a Mens backpack with Backpacking features while Osprey 's Siskin 8 Hydration Backpack is a Hydration backpack with Outdoor features.

The Osprey Atmos AG 50 Mens Backpacking Backpack has a capacity of 50L (liters), weighs 4.2 pounds and it's dimensions in inches are 32.68 x 14.96 x 15.35. It's made of 100D X 630D Nylon Dobby and is available in 3 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.