Swing is made from soft, stretchable, 95% cotton, and 5% spandex fabric that is colorfast, washable (line dry), long-lasting, rated to 150 lbs, and intended for children ages three years and up. Adult supervision is required, and to prevent injury only one person at a time should use swing. The knot may need to be re-positioned occasionally to a new area of the fabric to prevent excessive wear in one spot. Because the swing will stretch when in use, it may need to hang higher off the ground than your child can easily sit in. In no time your child will learn to pull the fabric to stretch it down. Then they can crawl right into it! Note: socks should be worn during use to prevent snags from toenails. Please contact us with any questions. Disclaimer: There is a chance the rope may fray over time especially if it receives a lot of friction so inspect strap occasionally to prevent breaks. Please Check and make sure knot is secure before using.