Rimpact PRO are Rimpact’s most protective insert. It utilizes an Energy Sensitive layer in conjunction with Rimpact ORIGINAL Foam to harden on impact and dissipate extreme forces across itself and the foam below rather than into the rim. The material remains supple and malleable meaning its easy to install yet when it counts, Rimpact steps it up maximum protection mode and allows you to ride it out when there’s no easy line choice!