AME mountain bike grips are composed of Vulcathane, a specially Blended rubber compound combined with UV stabilizing ingredients that exhibit superior oxidation and ozone resistanceWill not absorb moisture, deteriorate, harden or become slick with age, all the while providing and maintaining superior comfortSimilar in grip specifications and look to the MTB Zone grip, but constructed utilizing a different proprietary blend of materials to promote a firmer gripBuilt-in safety wire grooves to eliminate twistingGrey122mm30mm