Did you know sewing patterns for lingerie and swimwear are very simular? With exception of non-stretch underwear both use the same type of stretch in the fabrics. Although the fabric for swimwear usually is somewhat firmer both still need a good amount of 10 to 15% lycra (or spandex) yarns knitted along with the other yarns. The main difference is in the styling and way of trimming. Without any problem sewing patterns ment for lingerie can also be used to make swimwear. And of course the other way around as well.