The center snap creates the cleavage, the fit, and the added support. MATERIAL: 100% POLYESTER SILICONE ADHESIVE EACH PAIR CAN BE USED UP TO 30 TIMES PACKAGE: FLIP TOP BOX PRODUCT VISIBLE WHEN FLAP LIFTED 7.5ââ¬Â H X 5.5ââ¬Â W X 0.5ââ¬Â D