Prevent the weather from determining your workout schedule by slipping into the Arc'teryx Aptin Zip Hoody for midweight warmth that can either be used as a standalone piece during the shoulder season or as part of a layering system on the coldest of days. The smooth faced Polartec fabric traps heat and feels good against your skin to prevent chaffing and let you set a new personal best, while the hood and quarter zip combo allows you to regulate your body temperature by either trapping or releasing additional body heat.