The Royal Robbins Women's Essential Henna Tank is ideal for traveling in warm climates and general summer use. The fabric blend used combines comfortable cotton, durable, wrinkle resistant polyester and flexible, shape retaining spandex. 58% cotton, 37% polyester, 5% spandex. Its moisture wicking with a UPF 50+ for sun protection. The beautiful key hole back feature adds a little fun and style. Material: Cotton, Polyester, Spandex.