CRC "Pro-Cut" 1/12th Grey compound. Medium shore, long-wear, high grip, less rubber content, less tacky on high grip.

This is from the Japanese-made white/yellow/grey/black family of foam rubber.  A very light weight foam that resists carpet fiber collection as well as grip “pick-up”. This family of rubber is good at repelling loose carpet fibers and also tends not to get sticky as the run goes on. This compound wears faster than Pink/Purple and the Greene/Blu family of rubber.

Soft to hard

White – Yellow – Grey-low – Grey – Black