The duo zippers are sewn into the side seam, this creates the widest opening possible. This makes it easier to get your baby in and out of the infant car seat.
duo zipper and face flap
The duo zippers create a flap that is designed to fall away from your babys' face. We think this is way safer than flaps that fall onto the babys' face...once the velcro wears out (or gets dirty) the flap does not stay up.