Horse Pilot Mens Long Sleeve Shirt Aerolight Cloudy Blue 17 Incredible Things to Do in Marfa, Texas 90summers.com. An ergonomic fit that moves naturally with the body. The wrist and collar design is engineered to give the rider complete freedom of movement. Made from bi stretch fabric with UV Block technology, the shirt delivers both comfort and protection. Breathable by design micro perforated panels on the sides and back release heat efficiently during intense effort.