Ergon GP4 Evo BioKork Grips - Lock-On, Small, Black/TanThe natural material cork ensures a pleasant feel and excellent long distance comfort even without cycling gloves. Bar end grips also offer better comfort by allowing multiple hand positions on the grips. They also ensure better power transmission, delivering more control on demanding road or trail sections, long climbs or uneven terrain. The GP4 Evo BioKork is the evolution of the popular four finger bar end grip and offers you effective relief