If you’re going to ride in the cold, you might as well have a pack designed to handle it. 
Begin Press Release: 

USWE Announces New Hajker Winter Pack
MALM?, Sweden – USWE, a leader in packs for action sports, today announces the launch of its new Hajker Winter backpack, the ultimate bag for action and adventure and featuring USWE?s proprietary NDM harness system, smart organization and insulated shoulder straps called Themer Cell, a technology used to keep your drink tube from freezing in harsher conditions.

USWE has disrupted the hydration pack market with their 4-point harness system known as the NDM (No Dancing Monkey) Technology. NDM is the effect of the harness system, deflecting any possibility of your pack bouncing around regardless of the adventure you?re on. The USWE Winter is suited for cold weather hiking, mountaineering, Skiing, Winter Fat Biking, and Snowmobiling thanks to the one of a kind harness system that has no boundaries.
The Pro version is made from a hybrid of Robic and Extreema Nylon offering extreme durability, has an additional 2 zippered water-resistant side pockets, and a removable rolltop dry bag.

Lightweight and Waterproof (Pro: Built with Robic + Extreema Nylon)
Thermo Cell insulation shoulder strap (Removable insulated bladders)
1196g (Pro: Weight 1110g *excl. drysack)
Detachable waist belt with 2x zippered pockets and a back-mesh pocket
Hydration capacity: 3,0L / 100 oz (Not Included)
Chest fit range: 41 – 55cm / 16 &...