The efficient close-cut design of Trekkinglite -10°offers an excellent warmth-to-weight ratio and minimal packed size for extended treks in spring through autumn and even into winter conditions for warmer sleepers. This bag, with its added insulation and warmer rating is also an excellent choice for cold sleepers in spring and summer.. Women's features include a female-specific cut and extra down insulation in the torso and foot sections. It is built with the lightest materials in combination with high quality European down. A 20 D ripstop nylon shell is supple and durable and a DWR-free, 30 D nylon liner is comfortable against the skin. Keys to Trekkinglite Wmns efficient warmth are the new propotional differential cut (outer shell and inner liner sized for maximum down loft) and the multi-chambered 3-D foot box, which wraps the feet in 11 individual down-filled chambers. Additional warmth at the neck and shoulders is provided by a plush, adjustable draft collar. The hood accommodates an EXPED pillow, opens wide in warm weather, but contours closely around the head when closed in cooler conditions. Waterproof stuff sack and mesh storage duffle bag included.