Think of the 7AM Car Seat Cocoon as a warm, cozy cover for your baby's car seat! It fits all car seat models seamlessly, slipping on and off in seconds and fitting snugly thanks to a simply designed elastic base, and it also fits perfectly on the Doona car seat stroller. The cocoon is placed over the entire car seat, like a cover, and secured with the elastic base. It has a zipper in the middle & side shoulder zippers so you can get your baby in and out of it easily. And though it's resistant to both wind and rain, it's ultra-lightweight and comfortable for your little one. This infant car seat cover is a timesaver, too. You won't have to struggle with multiple layers of garments, just make sure your baby is well dressed in the car seat and the car seat cocoon will shield from the harshest conditions, keeping baby cozy on winter walks.