Vhabob Cherry MX Mechanical Keyboard Rubber O-Ring Switch Dampers(150pcs) + Keyboards Wire Keycap Puller Tool + Keyboard Cleaning Brush

Cuts down the sound a bit, but it's almost unnoticeable. The brush and key remover are nice though!

I haven't used the O Rings, but the key cap puller and brush are on point.

It takes 3 o rings to suppress noise... Even then it barely does.