The tank top is made of polyamide yarn, "seamless" without seams for a perfect fit, high breathability, and easy to wash and dry. Tank top made of polyamide yarn, "seamless" for a perfect fit, high breathability, and easy to wash and dry. Size development: - X girl 4/5 years - XXS girl 6/7 years - XS girl 8/10 years - S size 34/36 - M size 38/40