Not only is this 25-millimeter (1-inch), rubber mat comfortable and supportive, but both sides are non-slip so you feel extra secure. Its closed-cell, moisture-resistant surface is easy to clean ...

The best gym mat is the American Floor Mats Fit-Lock Rubber Flooring. ... Thickness: about 1/4 inch | Storage: Single, rollable flat sheets | Overall size: 2.5 by 5 feet.