Air Gap Technology helps protect against moisture, mold, mildew and small water leaks, Raises finish floor temperatures by up to 9° C / 17° F (R-value 1.4), Softens finished floors against hard concrete, Helps promote healthy indoor air quality, Strong enough to support up to 6,642 lbs. per sq. ft., Protects any finished floor type, Tongue and groove design makes installation fast and easy. , Brands may vary depending on item availability.