Two pairs together for use in low mountains or even as an everyday sock. 69%Recover Wool 17%Red-Cycled nylon 14%Stretch Nylon with Lycra,Technology for technical socks with two differentiated layers of yarn, blending different types of fibers to offer limited performance for athletes.,RecoverWool yarn is made of recycled post-industrial wool and recycled polyester. Blending these two types of wool strikes up a marvelous balance between thermoregulation and sweat wicking.,Red-Cycled Nylon yarn is 100% made with fish nets whose useful life in the fishing industry has come to an end. Instead of becoming a hazard at the bottom of the ocean, they are recycled into a new nylon yarn. It is known for its strength and cushioning.,Lycra is a synthetic elastane fiber that can stretch up to six times its length and go back to its original state. Its strategic placement in the outer layer of Lorpen socks guarantees a long life for our socks.