Rubber-Cal 48-in W x 48-in L x 0.375-in T Rubber Gym Floor Roll (16-sq ft) in the Gym Flooring department at Lowes.com
Amazon.com: 1/2in Thick 48 Sq Ft Rubber Top High Density EVA Foam Exercise Gym Mats Non-slip 12 Pcs - Interlocking Puzzle Floor Tiles for Home Gym Heavy Workout Equipment Flooring - 24