Tortle is a soft, comfortable beanie that is FDA cleared to help prevent and treat mild to moderate Flat Head Syndrome. Every baby is at risk for developing Flat Head Syndrome, however it is 100% preventable by consistent repositioning of your baby's head. From birth to 6 months, a baby's head is softest and therefore most vulnerable to becoming misshapen. It is recommended that all newborns wear a Tortle for the first 6 months of life to support healthy development. Tortle works by gently deflecting your baby's head from side to side while lying on their back. Tortle is the only device on the market that allows you to direct your baby's head in a specific position. To properly use the Tortle, you must pull the beanie down as far as possible so the crown of the head is fitted into the top of beanie and ears are covered. If the Tortle is covering baby's eyebrows, you can fold the front of the beanie. Once the Tortle becomes too tight, no longer covering baby's ears, or slips off, begin using a larger size. Tortle Repositioning Beanie Features: FDA cleared to prevent and treat Flat Head Syndrome. 1 in 2 babies will develop Flat Head Syndrome. Tortle is Recommended for all newborns: birth to 6 months. Every Baby will need a Small, Medium, and Large to keep up with their rapid growth Great for use in car seats, strollers, bouncers, and strollers Made of 95% cotton, 5% spandex