Challenger Friday Paddle, USA Pickleball Tournament Approved, T700 Carbon Fiber, Thermoformed Flat Top Design, Honeycomb Core, Tennis Style Grip, Gritty Surface for Spin (Haze, 1) Tropical Use the free app to Use the free app to control the Music Equalizer and Premium Bass from your smartphone These hot packs can be warmed in the microwave or a pot of boiling water to help relax muscle and increase blood flow or cooled in the freezer to help reduce swelling Increased Drive on Serves and Volleys: Challenger pickleball paddles are Thermoformed with a Raw Double Layer Carbon Fiber surface and a honeycomb core to increase drive on serves and volleys we unlocked the secret behind top tier pickleball technology