Columbia Infant and Toddler Size Chart Columbia Little Kids and Big Kids Size Chart Conquer the frigid outdoors without freezing your booty off in the Baselayer Midweight Tight. This brand is a member of the Sustainable Apparel Coalition. Omni-Heat™ thermal reflective lining boosts your body''s heat retention. Omni-Wick™ technology draws perspiration from high-moisture zones and disperses it across the fabric surface for faster drying. Form fitting. Four-way stretch fabric enhances comfort and allows wider range of movement. Elastic waist provides a comfortable fit. Ergonomic seaming improves your freedom of movement. Flatlock seams reduce chafing and increase comfort. 100% polyester Omni-Heat Reflective™ interlock. Machine wash cold, tumble dry low. Imported. Measurements: Waist Measurement: 18 in Outseam: 23 in Inseam: 18 in Front Rise: 5 in Back Rise: 11 in Leg Opening: 6 in Product measurements were taken using size 2XS (4-5 Little Kids). Please note that measurements may vary by size.