Sharkskin Ladies Chillproof Long Sleeve Shirt Wetsuit The comfortable micro fleece layer is next to the skin and wicks moisture and sweat away from the body to help keep you dry. The second middle technical layer is 100% windproof, yet breathes to regulate body temperature and stop windchill. The third outer layer is a nylon/lycra blend that's abrasion resistant, uv resistant for sun protection, and has a durable water repellent finish (dwr) to provide a protective shell that sheds water.