Pet Gear Lookout Booster Car Seat, Removable Comfort Pillow, Safety Tether Included, Installs in Seconds, No Tools Required, 2 Sizes, 3 Colors Sturdy foam with soft microsuede cover and removable plush pillow; machine washable Tether can be attached to pets harness to keep them comfortable and secure Booster is easily attached to car seat No assembly required Booster seat measures 18"L x 14"W x 11"H; for pets up to 15 lbs