Per yard, 104 thread count per square inch, flannel glove cotton for durability.. The heavy woven twill side scrubs well, while the fleece side is super absorbent. For really heavy duty cleaning jobs, you need a Really Heavy Duty Patch. Packaged in bags of 100 or 1000 in a variety of heavy duty patches #4 hd 2 1/2" square patches, pkg calibers. Made heavy duty patches #2 hd 1 3/8" square patches, pkg from a double thick, soft napped, 100% cotton, Canton flannel to hold more solvent and absorb more fouling without using twice as many patches. No more doubling up on patches when you tackle those really dirty bores. Strips are 7/8" x 6" for heavy duty patches #1 hd 7/8" square patches, pkg custom cuts to fit specific cleaning needs and are ideal for loop style tips. Extra Heavy Duty Flannel Glove Cotton. Extra tough patch that is fleeced on one side, natural on the other to get into the cracks and crevices where dirt hides. Same size selection, shipping weight and premium quality as our standard heavy duty patches #3 hd 1 3/4" square patches, pkg Bulk Cleaning Patches.