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

The main difference between the Thule 20L Lithos Backpack and the Thule Stir Alpine 40L Backpack is that the 20L Lithos Backpack has Side Pockets (Side pockets can fit water bottle) while the Stir Alpine 40L Backpack does not.

Thule Lithos Backpack Front View
Thule Stir Alpine 40L Backpack Front View
Specs Brand Thule Thule
Name 20L Lithos Backpack Stir Alpine 40L Backpack
Category Commuter Sports
Sub Category Everyday Ski
Capacity (L) 20L 40L
Dimensions (in) 11 x 9 x 17.3 11.42 x 10.24 x 22.83
Weight (lb) 1.6 2.9
Fabric Polyester Ripstop Coated 210D Robic, 70D Nylon
Color 8 colors and patterns Obsidian
Warranty Thule Guarantee Thule Guarantee
Release Date July 8, 2020 January 6, 2021
Rating 4.8 4.8
Price Under $100 Under $200
General Features Shoulder Straps Adjustable padded shoulder straps Padded shoulder straps with stretch pocket for snack
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
Main Compartment Access Normal zipped access Top loading and side zipped access
External Pockets 1 zipped front pocket and 2 side pockets Top floating pocket
Internal Compartments Internal sleeves and zipped mesh pocket Internal zippered mesh pockets
Side Pockets Side pockets can fit water bottle
Water Bottle Yes
Handles Top grab handle Top grab handle
Loops and Attachments Light lash point on front panel External gear attachment system for skis, helmet, ice axe and more
Business & School Features Laptop Sleeve Padded laptop pocket fits up to 15.6"
Tablet Sleeve Dedicated tablet pocket
Organizer Pocket Front utility pocket with organizer
Travel Features Compression Straps External compression straps
Stowable Straps Removable lid, frame sheet, hip belt padding and sternum strap
Hiking / Backpacking Features Back Panel Padded back panel Breathable back panel
Load Lifters Yes
Top / Floating Lid Yes
Hydration Features Hydration Compatible Yes

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


Thule 's 20L Lithos Backpack is a Commuter backpack with Everyday features while Thule 's Stir Alpine 40L Backpack is a Sports backpack with Ski features.

The Thule 20L Lithos Backpack has a capacity of 20L (liters), weighs 1.6 pounds and it's dimensions in inches are 11 x 9 x 17.3. It's made of Polyester Ripstop and is available in 8 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.