Shorts Under Armour Rival Fleece Short. Shorts Under Armour Rival Fleece Short. Free-cut men's Under Armour shorts. Durable, breathable and very pleasant material with a large proportion of cotton to keep you warm. The materials used dissipates moisture and dries faster. Wearing comfort helps the elastic waistband with laced to tighten. Side pockets with an internal pocket for the phone. Simple design with small logo at knee. Technology: Moisture Transport System (Wicks sweat away from your body to the surface of your clothes, making it easier to dry and keep you safe longer). Material: 57% cotton, 38% Polyester, 5% elastane (Spandex)