An extremely tight weave 100% cotton fabric was needed to keep the feather quills from poking through the fabric. Shooters learned long ago that the same properties which existed in pillow ticking were conductive to making excellent round ball patches. The tight weave 100% cotton fabric was rugged, resisted tearing and prevented burn-through. T/C offers pillow ticking patches prelubricated with Natural Lube 1000 Plus. All patches are biodegradable, and non-toxic. Uniform thickness assures consistent velocities from shot to shot. 100 per bag.