This Ritchey Ergo grip has an extremely plush feel, courtesy of a high-density foam body rather than rubber. The relatively smooth surface looks less aggressive than others but provides good grip and retains an acceptable degree of friction even when it gets wet.
This softness of the foam combined with the ergonomic shape means the grips sit securely in your hands, giving a feeling of greater control. Downsides? Even though it's grippy, the foam develops a squish factor when wet and the relatively wide profile means it might not be a first choice for anyone with smaller hands.