These pull up grips are great! The leather is thick enough to provide an extra element of grip but they're also thin enough to stop you from disassociating with what you're going on to. I've used them for negative pull-ups, negative chin-ups and dips as I slowly master the ability (and form the strength) to hoist my ample bodyweight skyward! I love the handmade nature of these grips and fully appreciate the time a person takes to make a product that is both individual and specifically functional to a given sport. I will be a returning customer fairly soon when I purchase one of their custom leather powerlifting belts too. I almost cannot wait...!