Cozy Plush on the Outside, Filled With Polyester Safety: This Infant Car Seat Head Neck gently protects your baby's fragile head and neck, and prevent the baby from rocking from side to side in the stroller or car Adjustable Design: This Baby Travel Pillow has a flexible hook&loop fastener in the center, you can adjust the spacing according to baby's head circumference and adjust as baby grows Material: Made from soft and cozy plush on the outside and filled with polyester inside, this toddler travel pillow is soft and gentle on baby's sensitive skin Usage: Banana U-shape pillow works with most infant car seat, swings and strollers that has 3-point or 5-point harness systems Easy to Install: The hook&loop fastener on the sides can be adjusted and to the harness according to the need for elastication, helping headrest hold in place