These Heavy Duty cleaning patches are made from a natural cotton blend, and are about 50% thicker than our regular cotton patches. They provide a great option for those “in-between” calibers, for example .25 cal – where one regular patch is too loose, and two patches stacked may be too tight. One side of the patch is coarse – ideal for tougher fouling, while the other side is napped similar to our regular patches. We offer a combined shipping rate when you assemble a cart prior to payment.