4 piece 2ft x 2ft BLUE interlocking exercise mats that create 16 square feet. Set up in seconds with easy do-it-yourself interlocking mats.n~9/16 of an inch thick for providing extra protection and impact absorption that exceeds the anti-fatigue protection requirement for high intensity training and workout.nMade from non-recycled, non-toxic, and high density EVA foam. They are lightweight, durable, and contains no lead.nWaterproof and easy to clean with damp cloth and mild soap. Lasts up to 10 years under proper care.nPassed CPSC standards and 53 substances of very high concern including toxicity report. Full test reports will be provided upon request.nWonder Mats are designed to provide a more comfortable workout experience for our customers. They are extra thick to provide the protection for all types of physical activity. They are made from high quality and non-recycled materials for durability and help keep up with your level of intensity. These mats are created to transform any hard surfaces into a comfortable personal space in seconds. Wonder Mats are ideal for home gyms, gymnastics, Pilates, cross fit, yoga and much more.