Perforated soft neoprene inner layer for superb ventilationSold in pairsTPR rubber limiters keep the cup where you need it even during extreme crashesEVS FLOATING SHELL CONCEPT: the hard outside shell is kept away from your knee as it rides on a flexible membrane on the outside layer, while the parts in contact with your leg are soft and breathable.Combined HARD IMPACT P.E. cup and molded biafoam