Portable Shopping Cart Seat Cushion. A new ultra comfortable approach to shopping with little ones. Soft, ergonomically designed cushions offer patented leg support to relieve the discomfort children endure sitting in cart seats. Our cushion requires no installation, slips easily into place and uses existing cart belts to secure your child. Versatile enough for use in restaurant highchairs, playground swings and many other harsh, uncomfortable seating situations. Smart new products for little ones on the go!