NO RETURNS or EXCHANGES. Please view the size chart & measure carefully. Runs small. We recommend sizing up 1 size. If you're tall or planning to wear with a diaper, we recommend sizing up 2 sizes. CARE INSTRUCTIONS 95% Cotton, 5% Spandex To keep your onesies nice, soft & long lasting, please follow these care instructions. Wash with cold/warm water on DELICATE or HAND WASH cycle with like colors. Use a gentle, NO BLEACH laundry detergent. Tumble dry on LOW heat or hang to allow to air dry.Avoid heat while washing/drying to prevent shrinkage. PRO TIP: Place onesies in a mesh laundry bag before placing it into the wash.