Save 17% when you add (3) 4.0 sheath to your cart today this order is for (1) 4.0 sheath underwear. Comprised of 95% modal and 5% elastase. Equipped with the new and improved circular dual sheath that separates the pole from the jewels. Designed in the style of a traditional boxer brief with urination fly appreciated by professional athletes, health and fitness enthusiasts, body builders, yoga practitioners, martial artists and those who seek unrivaled comfort while meeting the demands of life. Builders, yoga practitioners, martial artists and those who seek unrivaled comfort while meeting the demands of life.