Moisture-wicking microterry lining. Advanced memory foam. Versatile indoor/outdoor sole. Rugged outsole. Machine wash in cool water, dry flat away from heat. Men's Slipper Size - Medium - US 8-9/ EU 39-40/ UK 7-8, Large - US 9.5-10.5/ EU 41-42/ UK 8.5-9.5, Large - US 9.5-10.5/ EU 41-4/ UK 8.5-9.5, X-Larg - US 11-12/ EU 43-33/ UK 10-11, XX-Large - US 13-14/ EU 45-46/ UK 12-13.