Boys 100% Cotton Crew Neck Undershirt Made of cotton. It is anti-allergic. It provides comfort all day long with its soft and flexible texture. It fits the body properly, does not squeeze the skin and does not cause discomfort. It does not limit your child's mobility. It has a sweat-absorbing and breathable feature and a durable structure. It is suitable for even the most sensitive skin. It has a long service life. It is a 100% Healthy and Hygienic Product.