The Celtic knot on this sweater is called the Saxon Braid and is easy to knit because of the uniform repeats. I was fortunate to visit Ireland last summer and fell in love with the Kerry Coast. This unisex sweater ranges in sizes from 32 to 46 inches with a two inch ease. I knit this sweater with my favorite pure wool yarn; Plymouth Galway Worsted. You may wish to use a washable worsted weight yarn with the same gauge. Happy knitting!