From SNOO by Happiest Baby, this features: Used for babies whose doctors recommend elevating the head for stuffy noses or spitting up 2 x Leg Lifters - slip-resistant, elastomeric feet keep the bed securely in place on most surfaces Raises head of SNOO at a slight, safe incline Leg Lifters are compatible with SNOO’s regular legs as well as Low Legs Instructions: Lift the side of SNOO where your baby’s head rests Slide lifter onto each foot and push them on firmly Confirm they fit snugly, without wobbling—SNOO Leg Lifters are ready for use! Leg lifters should be installed while SNOO is not in use and unplugged Imported.