The quarter-length version of our sock is designed to keep your foot cool when it's hot, and vice versa. Made from a lightweight, soft, and breathable blend of polyamide, merino wool, and recycled Coolmax® polyester. Its durable stretchy knit structure is reinforced with a contrasting seamless toe and a sturdy heel.This sock is a SALEWA® Committed product with a high content of recycled materials that meets our additional environmental and sustainability standards.Breathable and soft against the skin, moisture-wicking and temperature-regulating merino blend, frictionless cushioned ankle, soft and fitted mid-cuff, durable technical mesh structure supported by stretchable PA filaments, reinforced seamless toe area, long-lasting heel protection, no blisters.