Class 4 Product is Rated Ultraviolet Resistant equal to or greater than 2000 hours. Bedding Recommended for Boat. Allow fabric to air dry. Care and Cleaning: Fabric should be cleaned regularly before substances such as dirt, roof particles,etc. are allowed to accumulate on and become embedded in the fabric. The fabric can be cleaned without being removed from the piece. Simply brush off any loose dirt, etc: clean with water and mild natural soap. Rinse thoroughly to remove soap.