Thule Stir Alpine 40L Backpack vs Head Bootbag

The main difference between the Thule Stir Alpine 40L Backpack and the Head Bootbag Backpack is that the Stir Alpine 40L Backpack has Sternum / Chest Straps (Sternum strap with whistle buckle) while the Bootbag Backpack does not.

Thule Stir Alpine 40L Backpack Front View
Head Bootbag - Front View
Specs Brand Thule Head
Name Stir Alpine 40L Backpack Bootbag Backpack
Category Sports Sports
Sub Category Ski Ski
Capacity (L) 40L 40L
Dimensions (in) 11.42 x 10.24 x 22.83 15.75 x 15/75 x 9.84
Weight (lb) 2.9 1.15
Fabric Coated 210D Robic, 70D Nylon Polyester
Color Obsidian Anthracite Or Yellow
Warranty Thule Guarantee
Release Date January 6, 2021 August 12, 2022
Rating 4.8 4.7
Price Under $200 Under $75
General Features Shoulder Straps Padded shoulder straps with stretch pocket for snack Adjustable should strap
Sternum / Chest Straps 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 2 way metal zipper
Main Compartment Access Top loading and side zipped access Wrap around zipper access
External Pockets Top floating pocket
Internal Compartments Internal zippered mesh pockets One large compartment
Handles Top grab handle
Loops and Attachments External gear attachment system for skis, helmet, ice axe and more Front carabiner
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
Load Lifters Yes
Top / Floating Lid Yes
Gym / Sports Features Shoe Compartment 1 large compartment to stow ski boots
Hydration Features Hydration Compatible Yes

You're currently comparing the Stir Alpine 40L Backpack by Thule against the Bootbag Backpack by Head.


Thule 's Stir Alpine 40L Backpack is a Sports backpack with Ski features while Head's Bootbag 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 Head Bootbag Backpack's capacity is 40L with a size of 15.75 x 15/75 x 9.84 inches. Constructed from Polyester it weighs 1.15 pounds and is available in Anthracite Or Yellow.