The Diaper Cover is a free PDF pattern available here. Knit using wool roving, it is a functional diaper cover when used with cloth diapers. Mine is less functional and more ornamental, made using an orphaned hank of Araucania Azapa -- a less absorbent blend of a bulky wool, alpaca, silk and tencil. But oh my goodness, it is so soft and beautiful! I made two covers in two sizes from the one hank of yarn.