Robby's Coolmax Plus Left Hand The fast-drying Cool-Max Plus provides the superior, patented metal support of all Robby's Originals, with the added assurance of dryness and comfort that can offer a competitive edge The Cool-Max Plus combines the benefits of Robby's Cool-Max with the longer, firmer design of Robby's Plus Right or left hand available in petite, small, medium, large and extra large sizes