We recommend this soft sleep cap for boys or girls ages 7 and up. The bamboo fibers of this luxurious cap are soft as silk, yet strong and durable. Bamboo features a moisture wicking property that helps it to dry quickly and adapt to the body's natural temperature. Bamboo fabric has natural antibacterial qualities, making it great for anyone who may be extra sensitive to germs and susceptible to infections. 95% bamboo viscose. 5% spandex. Delicate cycle or hand wash inside out. Dry flat or in cool dryer on low setting.