100% Cotton （“100% positive rating and 100% "fit as expected" results）Cotton Rich: Made from super soft comfy 100% combed cotton. Luxurious high content cotton provides ultimate comfort as they stay breathable and dry whole day. *PLEASE NOTE: All 100% cotton underwear shrink after wash, you could order 1 size up considering the weight and height of your kid. Cute Prints: These briefs have rich color variation with fresh prints and boys favorite theme, include dinosaurs, firetrucks, rockets, excavator, sharks, ships and more. Bring much fun for kiddo. Strong Seams & Edge-Wrapped Design: Edge-wrapped and smooth flat-lock seams prevent chafing, especially for naughty kids, reduce friction to the skin and let the kids well prepared for any scenario. Age & Laundry: Fit for toddlers boys and little kids, please refer to the size chart. Machine wash cold with similar colors. Only non-chlorine bleach when needed and tumble dry on low. Do not iron. We suggest hang drying our products to keep the fit as new as possible.