Mammut Guye Polartec Alpha Jacket, size XXL, one small flaw shown in last photo, otherwise in excellent condition. Because Polartec Alpha is more stable than other types of synthetic insulation, thinner backing fabrics can be used to increase breathability and save weight - Stretch-fleece panels along sides of body and arms enhance mobility - Stretch cuffs let you push sleeves up on your arms - Inner mesh drop-in pocket stows a hat or gloves