In its composition also contains Viscose OUTLAST®, which is a fiber that, thanks to its microcapsules thermocules, generates a micro climate between the garment and the skin where heat is retained. In turn, its thermal compensation ability minimizes sweat generation. The SKIING OUTLAST mountain sock also has Thermobamboo thermal fiber, whose thermal insulation increases the comfort temperature up to five degrees compared to other fibers. Seamless. Heel and toe are reinforced. Entire sock double woven for extra padding.