400 grams of Thinsulate keep feet warm while a DWR nubuck leather upper with our waterproof B-DRY liner ensures to keep feet dry

and Down Defender adds an extra measure of moisture management

Hot-Forged for lighter-weight construction

Full-facial protection that extends below the neckline

As with all sleeping bag liners

Osprey 4 Season's Insulation Kit Size:2 Liter 400 grams of Thinsulate keepKeep water flowing in cold winter months and cool in the heat of the summerthis four season insulated kit is ideal no matter the season. Featuring closed cell foam, a heat reflective coating, removable bite valve sleeve and easy carry attachment loops. Fits reservoirs up to 3 liters. *Compatible with Hydrapak reservoirs produced after 2013. Heat reflective, closed cell foam sleeve offers maximum insulation Tailored insulated reservoir sleeve with