WHAT IT IS / PRODUCT FEATURESLightweight merino wool blend for warmth and moisture wicking for moderate to cold rides. Material 125 g/m2 with 48% merino / 47% recycled polyester / 5% elastane provides the warmth of wool with the durability and sweat wicking of polyester.Machine washable.High collar.Color: 010 blackSize: XS - 2XLWeight: 141g. (M)Temperature range: -4 - 10 ˚C Material composition:48%wool 47%polyamide 5%elastane The natural warmth of wool is blended with recycled polyester to improve the moisture wicking of this warm and comfortable baselayer. It's stretchy and fits great, the sleeves are long enough to cover your wrists and you can use it for lounging at home. It's that comfortable.