Rubber-Cal "Revolution Interlocking Rubber Floor - 5/8 x 36 x 36-inch, 2 Pack, 18 sqr/ft coverage - 2 Style Options Revolution is 100% rubber mat and will not be affected by moisture or basement floods Eco-friendly rubber floor made from natural and reclaimed rubber materials making for Green Flooring Rubber floor sold in a 2-pack with an 18 square ft. seamless coverage, a rarity in interlocking rubber floor mats Interlocking rubber floor makes for an easy to install DIY project that does not require the use of pricey installer Anti-fatigue floor mat for use as gym flooring, basement flooring, garage floors or rubber floors where workers stand for long periods