These practice mats feature smooth, solid, durable, 18 oz. coated vinyl covering on the top and bottom surfaces, and has breather mesh sidewalls to permit controlled air venting on impact. The mats utilize layered filler, allowing for a single layer to be replaced, if necessary. Additionally, they have conveniently placed, 2" wide, heavy-duty, reinforced, webbing handles to allow for easier transport. Perfect as added training protection when performing vaults or exercising on floors, balance beams, bars or rings.