No it's not SPF like the stuff your mom slathers all over your face on the way out the door. It's SPF like Bones' Skatepark FormulaTM, a wheel compound designed to resist flatspotting on slick surfaces while maintaining impressive rebound and a faster roll. The Bones SPF Sidecut Skateboard Wheels have got it, plus a smooth wheel surface that's perfect for park riding. Well, what are you waiting for
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