Thermarest Questar 18C Down Sleeping Bag running shorts This K2 Powerstretch Fleece Waistcoat This K2 Powerstretch Fleece Waistcoat will be on every expedition kit list once you have experienced the unbelievable performance of the Polartec Powerstretch fabric – excellent warmth to weight ratio thermal and wicking properties make this waistcoat is a must have for skiing or layering in icy cold weather without the bulk of traditional fleeces An ultralight crew designed specifically for runners The fit of the bag has been perfected in our onsite cold chamber to create our W Comforter and blanket loops: tailor your sleeping system to the conditions by adding our technical comforters or blankets to the sleeping bag for extra warmth