Very soft base-layer with lyocell for softness on the inside and merino wool for warmth on the outside. The most comfortable base-layer we have. [--Read More--] Why freeze, if you can be warm? The secret of this Reima base layer set is a double-face knit: soft, silky lyocell 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 lyocell absorbs moisture away from the skin and helps kids feel fresh. The wool keeps kids warm, even if they become sweaty after busy play. This combination in a kids&'; thermal set is ideal for thermal comfort - both indoors and outdoors.