The New Acorn Slipper Sock Cotton (Grey Fabric) Slippers, unisex, Shoes , Closed Footwear , Slipper, MD (US Men's 9-10 US Women's 10.5-11.5) M, true, The famous Acorn original that has been comforting the feet of astronauts since 1982. Cotton twist uppers of 93% hypoallergenic cotton and 7% spandex. Lofty Acorn memory foam midsole over comfort cushion layer of featherweight EVA guarantees total comfort and therapy for feet. Full grain leather sidewall and suede leather outsole for durable comfort. Hand wash cold; air dry. Measurements: Weight: 8 oz Product measurements were taken using size MD (US Men's 9-10 US Women's 10.5-11.5) width M. Please note that measurements may vary by size. Weight of footwear is based on a single item not a pair.