Thule Stir Alpine 40L Backpack vs Thule RoundTrip Ski Boot Backpack

The main difference between the Thule Stir Alpine 40L Backpack and the Thule RoundTrip Ski Boot backpack is that the Stir Alpine 40L Backpack has Hip Belt / Waist Strap (Hip belt with gear loops) while the RoundTrip Ski Boot backpack does not.

Thule Stir Alpine 40L Backpack Front View
Thule RoundTrip Ski Boot backpack - Front View
Specs Brand Thule Thule
Name Stir Alpine 40L Backpack RoundTrip Ski Boot backpack
Category Sports Ski
Sub Category Ski Sports
Capacity (L) 40L 55L
Dimensions (in) 11.42 x 10.24 x 22.83 20 x 15.5 x 7
Weight (lb) 2.9 1
Fabric Coated 210D Robic, 70D Nylon Polyester
Color Obsidian Black/Wood Thrush
Warranty Thule Guarantee
Release Date January 6, 2021 July 1, 2020
Rating 4.8 4.7
Price Under $200 Under $150
General Features Shoulder Straps Padded shoulder straps with stretch pocket for snack Padded shoulder straps
Sternum / Chest Straps Sternum strap with whistle buckle Adjustable chest strap
Hip Belt / Waist Strap Hip belt with gear loops
Water Proof / Water Resistant Ultra durable material withstands weather and abrasion
Zippers Lockable zippers deter theft
Main Compartment Access Top loading and side zipped access Rear-loading main access
External Pockets Top floating pocket Two spacious side pockets store outwear, gloves and accessories, 1 front zip access, 1 top zip pocket
Internal Compartments Internal zippered mesh pockets
Side Pockets 2 side pockets
Handles Top grab handle Multiple grab handles allow for easy transport
Loops and Attachments External gear attachment system for skis, helmet, ice axe and more
Travel Features Compression Straps External compression straps
Stowable Straps Removable lid, frame sheet, hip belt padding and sternum strap
Base / Bottom Heavy duty tarpaulin bottom provides added protection
Hiking / Backpacking Features Back Panel Breathable back panel
Load Lifters Yes
Top / Floating Lid Yes
Hydration Features Hydration Compatible Yes

You're currently comparing the Stir Alpine 40L Backpack by Thule against the RoundTrip Ski Boot backpack by Thule.


Thule 's Stir Alpine 40L Backpack is a Sports backpack with Ski features while Thule's RoundTrip Ski Boot 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 Thule RoundTrip Ski Boot backpack's capacity is 55L with a size of 20 x 15.5 x 7 inches. Constructed from Polyester it weighs 1 pounds and is available in Black/Wood Thrush.