Packed with premium grey goose down and feathers, Arc'teryx’s Thorium jacket provides premium insulation in true alpine conditions. It secures with a No Slip Zip™ that’s equipped with “speed bumps” to prevent self-opening, while a full coverage hood and high collar ensure no chilly breezes get in. Two side pockets allow you to keep your valuables close by and the handy interior pocket includes a stuff sack so you can compactly pack the jacket when not in use.