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

The main difference between the Thule Stir Alpine 40L Backpack and the Deuter Alproof Lite 20 SL Backpack is that the Stir Alpine 40L Backpack has Water Proof / Water Resistant (Ultra durable material withstands weather and abrasion) while the Alproof Lite 20 SL Backpack does not.

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


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

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