 The resilience and propensity to (un)twist are general properties that affect the ease of hand-knitting.More resilient yarns are more forgiving of irregularities in tension; highly twisted yarns are sometimes difficult to knit, whereas untwisting yarns can lead to split stitches, in which not all the yarn is knitted into a stitch.A key factor in knitting is "stitch definition", corresponding to how well complicated stitch patterns can be seen when made from a given yarn.