I, like many pro and hobbyist detailers, have switched to using Microfiber cutting discs. Just like with foam pads, dissipating heat is a critical concern when using MF pads. Hence, a ventilated backing pad adds an additional margin of safety when working compounds hard. Uber's pad is of the highest quality and is a joy to use. It's worth evey penny, and has become a required piece of kit for every detailer.