... faced this problem:After you sittiing in the sofa or other chairs, there will be a pit,which shows you have sitted ... . 100% polyester,waterproof,breathable not muggy,anti-miteAbout 40cm*40cm or customized,square with 4 roundsa little cuteAbout 4cm thickDETAILS:High ... ALL the seats,like chair,car,bus and so on,or even just put it on the floor.The thickness is ...