The crawling kneepads are made from thick winter cotton that provides extra protection for your child’s knees when he or she is learning to crawl. The non-slip rubber pads on the knees will help your child to stay up when in crawling position, preventing his or her knees from sliding on a smooth surface. GoBabyGo kneepads can be used on bare knees or can be pulled over tights or pants. 80% Cotton, 17% P olyamide, 3% Elastane One size The non-slip rubber pads are made from silicone and are free from phthalates Wash inside out