Spa Hyde® is a type of vinyl that has been specially formulated for use in the spa industry to build hot tub covers. Unlike materials that have been borrowed from other industries Spa Hyde® has been designed for use in the harsh environment around a spa. Spa Hyde® is chlorine, bromine and ozone resistant. Mold and mildew resistance are built in as well.

The skin of a Spa Guy cover is constructed with 28 oz. Spa Hyde®. Spa Hyde's resistance to extreme cold, heat and Ultra-Violet Radiation make it more durable, longer lasting and virtually maintenance free.