Material that we use is EVA, Ethylene Vinyl Acetate, which is a special blend of bubbled plastic and rubber. Lightweight, yet extremely durable material. Waterproof (watertight), safe, non-toxic, fragrance-free and recyclable. Our materials can withstand temperatures as low as -50 ° C and as hot as +70 ° C. The unique materials we use make ECO-mats sound-, heat- and shock-resistant.