I really don’t think these are worth buying, I bought them to experiment, my hi hats don’t sizzle as well as they do on felts, wouldn’t buy again.

Cympad Optimerizes work much better than traditional felt washers. They allow the cymbal to move and vibrate more freely giving you a great sound and maximum sustain.

I saw little difference between these and wool. I've gotten similar brilliance with my rubber and plastic ones. It brightened the hi hat and less boom heard on the ride but is it worth nearly 20 bucks with the shipping, tax, added to it, no. Twenty bucks is sometimes all a drummer may earn in a night and he should get a meal, not these. These are for people like me, who have an accountant for a brother, to try for fun.