Thule Stir Alpine 40L Backpack vs Thule Upslope 20L Backpack

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

Thule Stir Alpine 40L Backpack Front View
Thule Upslope 20L Backpack
Specs Brand Thule Thule
Name Stir Alpine 40L Backpack Upslope 20L Backpack
Category Sports Sports
Sub Category Ski Ski
Capacity (L) 40L 20L
Dimensions (in) 11.42 x 10.24 x 22.83 13 x 11 x 21.3
Weight (lb) 2.9 1.7
Fabric Coated 210D Robic, 70D Nylon 420D Nylon
Color Obsidian 2 colors and patterns
Warranty Thule Guarantee Thule Guarantee
Release Date January 6, 2021 November 27, 2020
Rating 4.8 4.4
Price Under $200 Under $150
General Features Shoulder Straps Padded shoulder straps with stretch pocket for snack Adjustable shoulder straps with insulated hydration hose sleeve
Sternum / Chest Straps Sternum strap with whistle buckle Adjustable chest strap
Hip Belt / Waist Strap Hip belt with gear loops Adjustable waist strap
Water Proof / Water Resistant Ultra durable material withstands weather and abrasion
Main Compartment Access Top loading and side zipped access Top and side zipped access
External Pockets Top floating pocket Zipped side pocket
Internal Compartments Internal zippered mesh pockets Internal hydration sleeve
Side Pockets Side pocket can fit goggles, sunglasses or gloves
Handles Top grab handle Top grab handle
Loops and Attachments External gear attachment system for skis, helmet, ice axe and more Lash points for helmet, ski and board carry system, ice axe loop
Travel Features Compression Straps External compression straps Internal and external compression straps
Stowable Straps Removable lid, frame sheet, hip belt padding and sternum strap
Hiking / Backpacking Features Back Panel Breathable back panel Padded back panel
Load Lifters Yes
Top / Floating Lid Yes
Hydration Features Hydration Compatible Yes Yes

You're currently comparing the Stir Alpine 40L Backpack by Thule against the Upslope 20L Backpack by Thule .


Thule 's Stir Alpine 40L Backpack is a Sports backpack with Ski features while Thule 's Upslope 20L Backpack is a Sports backpack with Ski 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 Thule Upslope 20L Backpack's capacity is 20L with a size of 13 x 11 x 21.3 inches. Constructed from 420D Nylon it weighs 1.7 pounds and is available in 2 colors and patterns.