GAME-READY GEAR Firm Support for Serious Tumbling 1½″ HiD Ethacell — firm support for gymnastics, cheer, tumbling, and martial arts, and it folds for storage. 1½″ thick HiD Ethacell filler delivers the firm support needed for intense work — gymnastics, cheerleading, advanced tumbling, contact training, and martial arts. All mats are bacteria- and fire-resistant. Why Athletes Choose It Firm 1½″ HiD Ethacell: Support for intense tumbling and contact training. Built for Serious Athletes: Gymnasts, cheer, advanced tumblers, and martial arts. Bacteria & Fire Resistant: Safe and hygienic for heavy use. Folds for Storage: Rugged 18 oz vinyl cover. Firm, safe, and built for intensity — the FM Series Folding Polyethylene Mat holds up to the hardest training.