The foam mat protects your spine, hips, knees and elbows on hard floors, also protects floors from damage. Made of high density non-toxic eva foam, no bad smell. Each tile can easily be taken out and put back. Moisture-resistant and heat-insulating ; washable and durable. Mats interlock with simple puzzle connection for secure, seamless look — detachable edge pieces allows any tile to be a corner, border, or center — easily expand with additional tiles as your space grows — install in specific areas or wall-to-wall — combine multiple to cover larger areas. Great outdoor eva mat for patio, deck flooring, gazebos, walkways, garden paths, rooftop, picnic, play-areas under party tents, wedding tents, canopies — suitable indoors for playroom, recreation room, basement, home gym — makes a great anti fatigue mat for trade shows, conventions, office environment, gym, health care facility, daycare, classroom and more. Moisture-resistant and heat-insulating —the plush foam interlocking carpet provides cushion for hard floor surfaces — thick enough to protect while still gripping to the floor for balance and comfort — durable enough to maintain performance throughout product life