North Wolf Wool Buffing Pad is made of 100% wool material , Short nap Wool Pad With Foam 12 MM . North wolf good bonding technology ensure wool face not tear apart from hoop and loop. This wool pad without sponge middle layer , more durable , suggest to use with a interface pad for cushion. It is a washable wool pad , no worry for damage. Suggest to apply with rotary machine and 6inch backing plate.