100% Cotton, Made of pure cotton fabric, which is soft and breathable, comfortable to the touch and wears, not hurting the skin, moisture-wicking, neat in stitches, and good in workmanship. It can also protect pets and dogs from catching a cold in air-conditioned rooms. The pullover is suitable for most dogs. Our dog shirts have good elasticity and a four-leg design, which are easy to put on and take off for cats and dogs, easy to clean.