JMKRIDE Edge Guards. Left and Right interchangeable edge guards come in 2 pieces of the same color. Edge guards are an optional accessory that goes around the deck of your skate, and protects the deck's paint, and the grip tape from wear and tear. Edge Guards give you added durability for a longer lasting experience. Premium rubber vs Polymer edge guards, what's the difference? The premium rubber edge guards are thicker and offer more robust scratch and impact protection than the polymer edge guards. These premium rubber edge guards are also stretchable making them easier for application onto your skates! The polymer edge guards are thinner with a lower profile, giving your skates a more minimalist feel while still being protected, ideal for skaters looking for a stripped down minimalist freeskate set up!