It's 100% Cotton. If you also want to adorn your summer outfits with a cap, and also be protected from the sun, you can choose our cap model. This product will also be a great choice for your sports outfits. The Velcro on the back can be adjusted for any size size between 55 cm and 60 cm. 100% Cotton.; Sample Size: S/36/1; Model's Measurements: Height: 1.70 cm. Bust: 80, Waist: 58, Hips: 89, Size: S/36/1; Colors may vary during studio shots due to difference in light.