The Rooster Supertherm 4mm Neoprene sock - designed to keep your feet SUPER warm! The superstretch neoprene outer allows these socks to span several shoe sizes making it easier for you to find the correct size - a closer fit means warmer feet! Inside the sock there is a super soft, grey marle, quick-dry lining which not only improves the thermal qualities of the sock, it also feels very soft and comfortable next to your skin. The sock is glued and blind-stitched to prevent cold water flushing, with a comfortable seam layout designed to maximise comfort when wearing. The size chart shows the suggested size for each of these socks, allowing you to pick the one your require.We recommend hand washing in warm water and allowing to air dry. FEATURES 4mm superstretch neoprene Glued & blind stitched Plush, thermal, qucik-dry lining Comfortable seam layout Sizing Wet Sock Size Shoe Size     UK Europe USA Junior 1-3 33-36 1½-4 2X-Small/X-Small 3½-5 36.5-38.5 4½-6 Small/Medium 5½-7½ 39-42 6½-8 M-Large/Large 8-10½ 42.5-45.5 8½-11 X-Large/2X-Large 11-12 46-47 11½-12½