I'll be at the lake pet tank is 100% cotton. 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)) .: Note: For breeds with a larger chest, purchase one size up from the weight range. Pet tanks run small