Pull on your Reima Olmeri stretch fleece pants and head out! Stretch fleece provides cozy warmth under winter pantsyou can wear them over long underwear or instead of it. The material offers both excellent insulation and effective moisture transfer, making these pants a great choice for winter play and outdoor activities, such as skiing. Reima is committed to responsibility: this product contains Seawool fiber, a bio-based polyester made from oyster shells, and the remaining polyester is recycled. - Highly elastic, insulating, and quick-drying stretch fleece material - Soft brushed inner surface, smooth outer surfacehelps layers slide on and off easily - Elastic waistband Machine wash at 40°C; do not use bleach, fabric softener, or tumble dry. Room for growing: Each Reima product has 6 cm of extra space, meaning you can choose the apparel based on the child's current length, and have the piece of apparel fit through the entire season!