In autumn and spring, a down vest is perfect! Our ultralight down vest has 90% protective soft down and 10% feathers that create extra warmth. Small air pockets are created by the down, which conserves heat by trapping and holding the warm air. (with the vest you also get a matching bag, you can easily pack the vest in) Scandinavian Explorer only uses down that is certified. (By-product of food production.) Lined with 100% nylon. Large selection in sizes and colors.