Off to the mountains and away from the daily grind: Thanks to its honeycomb structure, the LOWA TREKKING sock will guarantee you some great times on your feet. The sock will surprise you with its exceptional stability and comfort. The combination of unique knitting technology with functional details to support your feet will deliver the perfect hiking experience. Sock size conversions from EU to USA sizes: EU 35-36 = US Women&';s 4.5 -5 EU 37-38 = US Women&';s 6-7, Men&';s 5-6 EU 39-40 = US Women&';s 7.5-8.5, Men&';s 6.5-7.5 EU 41-42 = US Women&';s 9-10, Men&';s 8-9 EU 43-44 = US Women&';s 10.5-11.5, Men&';s 9.5-10.5 EU 45-46 = US Men&';s 11-12 EU 47-48 = US Men&';s 13-14 Material Composition: 47% Polyamide-nylon 29% Polyporpylene 22% Merino Wool 2% Elastane