Designed to maintain the ideal temperature in every circumstance, the PLTN socks are extremely comfortable. They are made from PROLEN® yarn, a fabric that is 50% lighter than cotton, thermo regulating and more resistant to abrasion than wool or cotton. And equally important: PROLEN® yarn has a minimal negative impact on our environment.Get 15% off when buying 3 pair of socks:- Select 3 pair of any socks- Apply code SOCKBUNDLE at checkoutMaterial & care instructions:- 93% PROLEN®, 7% Elastane- Machine wash cold 30°C- Do not tumble dry, nor iron