Welcome to fam!
@Dnollie said :
... material people use on surfboards/paddle boards for the Onewheel grip? That rubber diamond shaped traction pad type thing?
Sounds familiar to EvoGRIP™ Diamond Stud ?
StickyFeet -- they've been trending throughout various media platforms lately. Somewhat 'next level' new solution after numerous dif griptapes, foam-pads etc.
(No personal experience, tho.)