FOR GIRLS, BY GIRLS - Sportswear designed to fit the female body perfectly. Our baselayers are designed using body-mapping and should be worn next-to-skin. For optimal warmth, we recommend choosing your normal clothing size; For a looser fit you should go up one size CARE INSTRUCTIONS: Machine wash cold. Hang dry. Do not use fabric softener,BUILT FOR WARMTH - Our warmest all synthetic base layer, the Lune tights are made from a smooth and shiny polyester material with 4-way stretch,WINTER ATHLETES -The thermal leggings have thinner side panels that provide some ventilation as well as flatlock seams for ultimate comfort and to help prevent chafing when active,ACTIVEWEAR - Slim fit leggings, perfect for layering. Brushed inside creates the softest feel and helps to wick-moisture,PERFORMANCE LAYERING - The Kari Traa Lune Pant is a versatile and athletic 4-season base layer that is a favorite choice for most cold weather activities