Deuter Alproof Lite 20 SL Backpack vs Thule Stir Alpine 40L Backpack

The main difference between the Deuter Alproof Lite 20 SL Backpack and the Thule Stir Alpine 40L Backpack is that the Alproof Lite 20 SL Backpack has Zippers (Nylon zipper with string pulls) while the Stir Alpine 40L Backpack does not.

Deuter Alproof Lite 20 SL Backpack - Front View
Thule Stir Alpine 40L Backpack Front View
Specs Brand Deuter Thule
Name Alproof Lite 20 SL Backpack Stir Alpine 40L Backpack
Category Ski Sports
Sub Category Sports Ski
Capacity (L) 20L 40L
Dimensions (in) 19.6 x 11.4 x 7.4 11.42 x 10.24 x 22.83
Weight (lb) 5.29 2.9
Fabric 330D PA 6.6 Ripstop Coated 210D Robic, 70D Nylon
Color Green Obsidian
Warranty 2 years warranty Thule Guarantee
Release Date January 6, 2021
Rating 4.8
Price Under $1500 Under $200
General Features Shoulder Straps Load adjustment straps Padded shoulder straps with stretch pocket for snack
Sternum / Chest Straps Adjustable sternum strap with signal whistle Sternum strap with whistle buckle
Hip Belt / Waist Strap Adjustable waist strap Hip belt with gear loops
Water Proof / Water Resistant Ultra durable material withstands weather and abrasion
Zippers Nylon zipper with string pulls
Main Compartment Access Normal top two way zip access Top loading and side zipped access
External Pockets 2 external pockets Top floating pocket
Internal Compartments Three zipped inner pockets Internal zippered mesh pockets
Side Pockets 2 side pockets
Water Bottle Yes
Handles Top grab handle Top grab handle
Loops and Attachments Ice Axe Attachment, helmet clips, material straps External gear attachment system for skis, helmet, ice axe and more
Lightweight Lightweight
Travel Features Compression Straps External compression straps
Stowable Straps Removable lid, frame sheet, hip belt padding and sternum strap
Hiking / Backpacking Features Back Panel Padded Breathable back panel
Load Lifters Yes
Hip Belt Pockets 2 hip belt pocket
Top / Floating Lid Yes
Hydration Features Hydration Compatible Yes
Other Features Other Features Alpride E2 Airbag System

You're currently comparing the Alproof Lite 20 SL Backpack by Deuter against the Stir Alpine 40L Backpack by Thule .


Deuter 's Alproof Lite 20 SL Backpack is a Ski backpack with Sports features while Thule 's Stir Alpine 40L Backpack is a Sports backpack with Ski features.

The Deuter Alproof Lite 20 SL Backpack has a capacity of 20L (liters), weighs 5.29 pounds and it's dimensions in inches are 19.6 x 11.4 x 7.4. It's made of 330D PA 6.6 Ripstop and is available in Green in comparison the Thule Stir Alpine 40L Backpack's capacity is 40L with a size of 11.42 x 10.24 x 22.83 inches. Constructed from Coated 210D Robic, 70D Nylon it weighs 2.9 pounds and is available in Obsidian.