Description of Mammut Stratus Jacket Very light and warm. With a fill weight of 60 g MTI®, this jacket is very packable yet has plenty of insulation. Stows in its own outside pocket. Can be worn separately, or as an additional layer of insulation. Features: One-hand adjustable collar Adjustable hem Light and stows easily 2 side pockets, 1 breast pocket Lycra® cuffs M.A.P. hood