AcoustiCORK RCLT underlayment sheet features a material combination of recycled rubber, high density foam, and cork. These tiles are convenient in size, easily portable and offer superior function for crack suppression and comfort underfoot. RCLT is designed to reduce noise underfoot and is great for use in the home, apartments and commercial applications. Material - AcoustiCORK RCLT500 is composed of rubber, cork, and high density foam and consists of 85% recycled material, making this a very eco-friendly product. Size - 2' x 3' tiles Thickness - 5 mm Weight - 4 lb each sheet Origin - Made in USA.