Fully waterproof socks from Sealskinz 100% waterproof, windproof and breathable Three-layer construction Merino wool lining - for moisture control, insulation and comfort Zonal elastication - adds support Four-way stretch - for added comfort and better fit Flat toe seams - prevent rubbing and blisters Footbed padding - reduces pressure and increases shock absorption Outer materials: 62% polycolon / 29% nylon / 9% elastane Inner materials: 36% merino wool / 36% acrylic / 18% polyester / 5% nylon / 5% elastane Recommended activity - trail running