This “understyle” bracket system permits the spa duvet to rest lower against the spa for a less obstructed view. The bracket system slides beneath the spa. Black powder covered, rust-free construction with non-corrosive composite mounting brackets. The understyle bracket is best possible for plastic-skirted spas. The lifter handiest wishes 18 inches of clearance in the back of the spa. The CoverMate 2 fits nearly any spa as much as eight feet in width.