Why freeze, if you can be warm? The secret of this Reima base layer set is a double-face knit: a soft, silky bamboo viscose against the skin to absorb moisture and give a smooth feel, with wool on the surface, for the best possible warmth at the base layer. The bamboo viscose absorbs moisture away from the skin and help kids feel fresh. The wool keeps kids warm, even if they become sweaty after busy play. This combination is ideal for thermal comfort - both indoors and outdoors.