Custom pet clothes are more than just good fashion, they’re also perfect for keeping your tiny (or not so tiny) friend warm. This pet tank is 100% cotton for base colors but includes polyester in heather variations. It is safe to machine wash and comes in multiple sizes: M - XL. For breeds with larger chests, sizing up is recommended. .: 100% combed ringspun cotton (fiber content may vary for different colors) .: Medium fabric (5 oz/yd² (169 g/m²)) .: EasyTear™ label .: Note: For breeds with a larger chest, purchase one size up from the weight range. Pet tanks run small