Product specifications: S (37-39) code, M (40-42) code, L (43-46 code), XL (47-50) code Material properties: outer layer 65% high nylon, 35% elastic elastic band; Middle layer waterproof and breathable film; Inner layer 80% fine yarn count yarn, 20% nylon Scope of application: daily outdoor sports, skiing, hiking, cross-country, etc Selling: 1. Three-layer composite fabric, wading without "wet" feet to wear without stuffy feet 2. The outer layer of wear-resistant nylon, easy to hang dry 3. The middle layer is waterproof and moisture-wicking to avoid blisters 4. The inner layer is made of high-quality yarn, which is soft and wear-resistant, moisture-wicking and sweat-wicking 5. Whether it is long-distance running or cross-country crossing, do not be afraid of rain, snow and mud, and fully enjoy the fun brought by running