Is baby starting to crawl? You need Happy Knees! These soft and comfortable knee pads help protect your babys knees as they explore their expanding world! Made with a cotton/poly/nylon blend Happy Knees are machine washable and stretch to fit baby with a non-slip grip! Be confident in your Bella Tuno Happy Knees purchase, they not only produce quality products, its also their company mission to donate one meal to a child in need for each purchase. By purchasing this product you've helped feed a hungry child.