This seat extender insert is designed to be used with the Britax baby carrier. Use it when your child outgrows the infant insert to extend the life of your carrier. This seat extender insert provides a wider seating area by cradling your babys bottom and thighs, allowing him to wrap his legs around your waist. This position distributes your baby's weight more evenly for longer-wearing comfort. Made from 100% organic cotton, this tan insert is machine washable and soft against Baby's skin.