The Dex Products Secure Sleeper Ultra 3 in 1 Sleep Positioner helps your infant sleep safer and more comfortably. Sleep positioner helps your baby in 3 different ways. The wedge design keeps baby''s head elevated to prevent Acid Reflux. The side supports make sure your baby sleeps in the back position as recommended by pediatrcians. The foam cushion helps to prevent Plagiocephaly and relieves uncomfortable pressure points associated with mattresses.