The nylon swim trainer is a great choice for TYR water polo wear. It provides endurance and resilience for the toughest of watermen who put these shorts through the most rigorous of workouts. Our Training 2.0 category features heavy gauge construction, million yard, and flat braided draw cords that will stay tied. The side seam is designed with a modest cut to allow better mobility to reduce drag while providing comfort. The flat locked seams are tough, durable, and long lasting. This means that not only can you wear them for the most intense exercise routine, but they will also last you a long time.