He shall therefore burn that garment, whether warp or woof, in woollen or in linen, or any thing of skin, wherein the plague is: for it is a fretting leprosy; it shall be burnt in the fire.
He must burn the clothing, whether made of wool, linen, or skin, if it has the plague on it. It's a kind of leprosy that damages things, so it needs to be burned in fire.