éThe Dare2b Cool Off III is a fantastic thermal base layer set for kids that will keep them warm when it really matters. Featuring separate top and bottoms in stretchy comfort fabric with wicking and quick drying properties. The Cool Off III is a wardrobe essential for winter. Dare 2B Kids Unisex Sizing (waist approx): 2 Years (19in), 3-4 Years (19.5in), 5-6 Years (20.5in), 7-8 Years (21.5in). 100% Polyester.é