Pillow Top - the absolute best seller knob for ProTaper - is designed with a unique texture pattern on the surface and with a gel-like compound, which reduces vibrations and increases grip and comfort. The triple density construction not only creates an incredible feel with the handlebar, but also extends the life of the grip. The Vibrasonix® Pillow Top compound drastically reduces vibrations and impact shocks. The reinforcement on the outer end is manufactured with a high hardness compound to extend its longevity. The ProTaper Pillow Top knobs are also designed to facilitate self-cleaning and allow you to keep the mud away from the external surface.