Neoprene Imported 2mm Terraprene neoprene core Nylon inner and outer covering Titanium laminate adhesive DWR coating, HydroCuff top Medium fits Men's shoe size 6-7 2mm NRS Sandal Socks These 2mm NRS Sandal Socks are great for preventing cold feet! Made of 2mm neoprene with a titanium laminate adhesive, these socks add just the right amount of warmth and comfort. Sealed seams reduce the flow of cold water and the HydroCuff top creates a comfortable seal around the ankle! There's also a three panel construction that fits great into shoes and sandals! Rock Solid Guarantee: NRS guarantees all products to the original owner against defects in materials and workmanship. If at any time you're not satisfied with the performance of an NRS product, please contact Wetsuit Wearhouse or contact NRS directly for an evaluation. If NRS finds a product to be defective, they will at their option repair it, replace it, or refund the purchase price. NRS will not be responsible for any consequential or incidental damages caused by or resulting from the use or performance of NRS products. Chlorine damage is not covered.