Pie Hat cymbal washers are made from Mick's Picks exclusive Flextex material and are thinner and much more stable than traditional felt washers that have been the standard for 60+ years. Pie Hats will not compress and lose their shape under tension. This means you can really tighten down if you want to eliminate cymbal “wave”. If you like your cymbals “loose” the friction from movement will not abrade Pie Hats like it will other washers. At 60mm thick, you can customize your set up by stacking Pie Hats for the perfect fit. The Flextex material is superior at isolating the cymbal from the stand for better resonance and natural sound.