(Short Sleeve White) 75% cotton, 25% polyester. Ribbed cuffs and raglan sleeves. It is not only stretchy but also has firm seams so you can use it for a long time. Quarter Pants: (Navy) 90% polyester, 10% cotton. The waist part has an elastic band and a drawstring so you can adjust the size. There is also a pocket on the back so you can put a handkerchief.