WeatherTech W9 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