When pushing through harsh conditions for the summit, we're layered with The North Face Glacier Heavyweight Full-Zip Jacket. The raglan sleeves and stretch overlay keep us moving freely, while the recycled fleece fabrication traps heat and moves moisture away. With low-profile, elastic-bound collar, cuffs, and hem, this layer sits comfortably under our shell, and when worn alone, its water-repellent treatment sheds flurries and spindrift.