WeatherTech W4 Classic Premium Rubber Mats Made of natural heavy duty rubber with a protective non-stick finish for quick cleanup Deeply sculpted channels designed to trap water/road salt/mud and san Hold up to 11, 2 quarts of water without spilling Made of 16 lbs. of pliable natural rubber, with anti-skid ridges to revent shifting Will not curl/crack/harden in sub-zero weather and holds up to 1 1/2 quarts of liquid without spilling