Due to the very strong grip on the bar, the Carbon Grips are not suitable for all exercises. For example, in dynamic movements such as muscle ups or freestyle calisthenics, it can be helpful if you can more easily release your hands from the bar. The leather grips provide a good grip, but at the same time you are flexible enough to bring full performance during dynamic movements. Therefore, for the focus on maximum grip we recommend the Carbon Grips and for dynamic exercises the Leather Grips.