The clover leaf design fits into the car seat, so you can keep your baby warm without interference from the car seat straps. This makes the car seat safer by not using a heavy coat on your child. You wrap the baby like a burrito. Fold up the bottom, then the 2 sides.No more losing the blanket. When carrying the car seat, you can fold the top over. It provides a cover to the car seat that is easy to remove for washing. Reversible. Machine Washable. Made with 100% flannel on both sides. Measures approximately 46" X 46" and is designed for both newborn and infant car seats.