A durable rubber type material that can flex easily but return to its original shape very fast

I'm looking for a durable rubber type of material for a guitar pick holder. The material I'm looking for will need to have flexibility to pick individual notes of a guitar, but needs to return to its original shape/position as fast as possible for picking faster notes.


I've tried vulcanized rubber sheets of different thicknesses (1 mm to 4 mm), it has good flexibility, but returning to its original shape is very slow.


The material from a bouncy ball is the closest material I can imagine for what I need, but I need something in a sheet form.


