OUR MCE-SPEC TPO MATERIAL IS SO DURABLE YET FLEXIBLE, WE HAVE AN INDUSTRY LEADING LIFETIME WARRANTY TO THE ORIGINAL BUYER AGAINST CRACKING. TEMPERATURE, WEATHER, OFF-ROAD, ETC. DOES NOT EFFECT THIS WARRANTY. AFTERALL, WE ARE 4X4 ENTHUSIASTS AND ORIGINALLY BEGAN BUILDING FENDERS THAT DON’T BREAK FOR OURSELVES.