The APS Pro ALPHA Padis a thermally stable, high quality foam Made in Germany.The open-cell structure of the foam gives the pad the flexibly to follow the surface unevenness, depending on its hardness. At the same time, the removed "dead" particles are quickly transported into the interior of the pad.
Very easy to control. No bending up of edges. Easy to clean and come out as new. Very pleased
Using both 3 inch and 5 inch on my Flex buffers.
ps Working with Scott is always a pleasant experince.