Reddit mentions of MAD CATZ Medium G.L.I.D.E. 21

The MP510 is the roughest pad I know in terms of feel of the material, so a certain scratchiness is part of the deal -- just know that this is mostly due to the type of fabric used and not something that actually 'scratches' your mouse more than a standard cloth pad, in other words you'll have that same sensation on just about any hybrid pad, just to a lesser degree. That scratchiness is only heard, not felt however, it should not impact the way your mouse moves at all.

Since you are from Germany like me I recommend you order either one of those three pads or all three of them from Amazon and return all but the one you like. I've done that every time I've chosen a pad without issues:

a) The AMP500. The most recommended pad on this sub, this should feel the least 'scratchy' or 'gritty' out of them all but it's also the slowest option, though not by much. It's a very fast pad that still offers a good degree of control, making it a good choice in just about every situation. If the sound (or the psychology behind the sound) bothers you the most I assume this'll be your best choice

b) The GLIDE 21. Basically the same pad as the AMP500 but ever so slightly faster with a bumpier and rougher surface, which again isn't necessarily felt in-game, but the difference can be slightly heard. People usually choose the GLIDE over the AMP only because the GLIDE 38 is larger than the AMP since the AMP is considered to be of a higher quality, but if you want to save a few bucks or care about this very slight difference the GLIDE 21 should be just as good an option.

c) The SPC Endorphy (the L option). This thing is speed and nothing but speed. It's made from the same material as the MP510 but a lot smoother -- you'll still hear the scratchiness but it'll feel like sliding the mouse on ice. This thing has basically no control, which isn't necessarily a bad thing but can take some getting used to.

here https://www.amazon.fr/Madcatz-G-L-I-D-21-Noir-430X370X1/dp/B07J53PRKN