ESI grips provide superior comfort and a do not slide around once installed. They are made of silicone which is UV stabilised so the colour remains for the life of the grip. The Chunky ESI's are ideal if you are using gripshifts, just cut them to suit your bar setup and they provide a smooth transition to your Grip shifters.
The ESI grips mold to your hands which gives you a semi ergo fit, they are soft and do a good job of eating up trail vibrations. Best installed and removed with compressed air.