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

The main difference between the Thule RoundTrip Ski Boot backpack and the Thule Stir Alpine 40L Backpack is that the RoundTrip Ski Boot backpack has Zippers (Lockable zippers deter theft) while the Stir Alpine 40L Backpack does not.

Thule RoundTrip Ski Boot backpack - Front View
Thule Stir Alpine 40L Backpack Front View
Specs Brand Thule Thule
Name RoundTrip Ski Boot backpack Stir Alpine 40L Backpack
Category Ski Sports
Sub Category Sports Ski
Capacity (L) 55L 40L
Dimensions (in) 20 x 15.5 x 7 11.42 x 10.24 x 22.83
Weight (lb) 1 2.9
Fabric Polyester Coated 210D Robic, 70D Nylon
Color Black/Wood Thrush Obsidian
Warranty Thule Guarantee
Release Date July 1, 2020 January 6, 2021
Rating 4.7 4.8
Price Under $150 Under $200
General Features Shoulder Straps Padded shoulder straps Padded shoulder straps with stretch pocket for snack
Sternum / Chest Straps Adjustable chest strap Sternum strap with whistle buckle
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 Rear-loading main access Top loading and side zipped access
External Pockets Two spacious side pockets store outwear, gloves and accessories, 1 front zip access, 1 top zip pocket Top floating pocket
Internal Compartments Internal zippered mesh pockets
Side Pockets 2 side pockets
Handles Multiple grab handles allow for easy transport Top grab handle
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 RoundTrip Ski Boot backpack by Thule against the Stir Alpine 40L Backpack by Thule .


Thule's RoundTrip Ski Boot backpack is a Ski backpack with Sports features while Thule 's Stir Alpine 40L Backpack is a Sports backpack with Ski features.

The Thule RoundTrip Ski Boot backpack has a capacity of 55L (liters), weighs 1 pounds and it's dimensions in inches are 20 x 15.5 x 7. It's made of Polyester and is available in Black/Wood Thrush 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.