Our most breathable insulation vest, the lyngen alpha90 Vest. The unique @polartecfabric Alpha® is engineered to provide consistent warmth, while continuously releasing excess body heat, and allowing greater breathability during activity. A Polartec Alpha garment can be worn in both the "stop" and "go" phases of outdoor activities. Current market synthetic insulations are not breathable enough to handle the "go" phases of most backcountry pursuits. They are typically additional garments that must be carried for use during static periods. Polartec Alpha excels at providing comfort for users on the move. Head over to norrona.com and discover our alpha products. #welcometonature