Thousands of hours of testing and three years of development were put into the original s1 pro knee pads and s1 have now invested even more time and development into their new updated gen 2 pro knee pads many skaters will be familiar with the original s1 pro knee pads and the secure comfortable fit that they provide rest assured this has not been compromised with the introduction of the lengthened butterfly fastening straps and bottom cinch straps the straps which have been lengthened fo