Aftermarket Replacement Pads Liner Compatible with Protec Ace Helmet Aftermarket Replacement Fit Pads Liner Cushions kit compatible with Protec Ace helmet 5/16 inch thickness, competitors are only 1/16 inch Includes FREE sticky self adhesive Hook Fastener Dot Tabs that stick to your helmet and these pads High quality material foam, washable, breathable Proudly made in the USA