Fjällräven Expedition Down Knickers M are lightweight down shorts designed for winter hiking and ski touring. They are excellent as an insulating layer over shell pants during breaks or as a mid layer in cold weather. Side zips allow for easy dressing even with ski boots. They are made of recycled polyamide with a 90/10 duck down filling with a fill power of 700 CUIN. The waistband has a back elastic and side velcro fasteners for quick layering.