Thule Vital Hydration Pack vs Thule Stir Alpine 40L Backpack

The main difference between the Thule Vital Hydration Pack and the Thule Stir Alpine 40L Backpack is that the Vital Hydration Pack has Side Pockets (Side pockets can fit nutrition snacks ) while the Stir Alpine 40L Backpack does not.

Thule Vital Hydration Pack Front View
Thule Stir Alpine 40L Backpack Front View
Specs Brand Thule Thule
Name Vital Hydration Pack Stir Alpine 40L Backpack
Category Hydration Sports
Sub Category Outdoor Ski
Capacity (L) 6L 40L
Dimensions (in) 8.7 x 3.5 x 17.5 11.42 x 10.24 x 22.83
Weight (lb) 1.2 2.9
Fabric Nylon Coated 210D Robic, 70D Nylon
Color 2 colors and patterns Obsidian
Warranty Thule Guarantee Thule Guarantee
Release Date January 16, 2018 January 6, 2021
Rating 4.6 4.8
Price Under $150 Under $200
General Features Shoulder Straps Adjustable shoulder straps Padded shoulder straps with stretch pocket for snack
Sternum / Chest Straps Sternum 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
Main Compartment Access Normal zipped access Top loading and side zipped access
External Pockets Zipped top pocket and 2 quick access side pockets Top floating pocket
Internal Compartments Internal hydration sleeve, pump sleeves, and and zipped pocket for keys or small essentials Internal zippered mesh pockets
Side Pockets Side pockets can fit nutrition snacks
Water Bottle No
Handles Top grab handle
Loops and Attachments Light loop attachment External gear attachment system for skis, helmet, ice axe and more
Lightweight Yes
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
Ventilated Back Ventilated back panel
Top / Floating Lid Yes
Hydration Features Bladder Size Includes 2.5L Hydrapak reservoir
Hydration Compatible YEs Yes
Other Features Other Features Retrakt magnetic hose return system

You're currently comparing the Vital Hydration Pack by Thule against the Stir Alpine 40L Backpack by Thule .


Thule 's Vital Hydration Pack is a Hydration backpack with Outdoor features while Thule 's Stir Alpine 40L Backpack is a Sports backpack with Ski features.

The Thule Vital Hydration Pack has a capacity of 6L (liters), weighs 1.2 pounds and it's dimensions in inches are 8.7 x 3.5 x 17.5 . It's made of Nylon and is available in 2 colors and patterns 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.