Fully waterproof socks from Sealskinz. 100% waterproof, windproof and breathable with a three-layer construction. The Merino wool lining provides moisture control, insulation, and comfort. Zonal elastication adds support and four-way stretch ensures a better fit. Flat toe seams prevent rubbing and blisters, while 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. These socks are easy to care for: Wash at 40ºC/105ºF and Do Not Dry Clean, Iron, or Bleach. Stay comfortable, dry, and ready for any weather with our reliable ankle length socks.