Comfort at the Campsite or Around Town Getting comfortable shouldn't be a struggle. The Sierra Designs Down Slip-Ons are easy-on, easy-off slippers stuffed with 800-fill DriDown(TM) insulation for the coziest adventures away from home. Silicone soles and oxford sidewalls provide traction and durability when relaxing turns to roaming, and the long-lasting foam midsole provides lightweight support under foot. Plus, with PFC-free Durable Water Repellent (DWR) coating and an elastic cuff to keep moisture and drafts out, you can finally give the cold shoulder to cold feet. Features 800 Fill DriDown(TM) 100% Recycled Polyester Taffeta Silicone bottom sole grip for added traction Tricot lining Elastic cuff to seal in warmth Durable oxford sidewall PE foam midsole for lightweight cushioning C0 PFC-Free DWR Materials Shell: 100% Recycled Polyester Taffeta with PFC-Free C0 DWR Fill: DriDown Liner: 100% Polyester Tricot Tech Specs - Size M Weight: 7 oz / 198 g Fill Weight: 1.4 oz / 40 g