Rubber Flooring Gym Mat 39" x 39" (1m x 1m)Made of recycled, non smelly, consumer grade rubber, these mats were designed specifically for weightlifting. With ultra smooth, easy to clean fine rubber on the top and larger crumb rubber on the bottom, these bad boys are going nowhere. The specialized bumps on the bottom help disperse the weight being dropped for less bounce, effective sound dampening, and better drainage in basement and garage gyms. Their compact, square design ensures a snug fit