polyester car seat cushion 1.inner sponge is around 10 -15mm thick . 2.easily to be install polyester car seat cushion1.inner sponge is around 10 -15mm thick .2.skid resistance 3.easily to be install 4.different size and color is available5.packing:7pcs/set(incl. 2 neck cushions),5 sets/CTNCTN size:99*49*53cm