1. 20 years reputation. 2. thick and hard felt pad 3. in polyester 4. 0.5 ... with wools, chemical fibers etc.1. Thick felt & Hard felt Thick felt suitable for ink pads, piano cushion, ... collector bags, it can in place of rubber collars. Hard felt suitable for sole material, fishing wader and special ... and movement.different colors.different thickness 100% polyester Hard and thick needle punched felt