Put on this fun American Flag Jockstrap and become Captain America. here to save the day and put some fun in the party. A patriotic take on the classic sexy male jockstrap. this American flag-themed piece of men's underwear is great for letting the world know that you are ready to explode like fireworks on the Fourth of July. Whether heading out for a super celebration or staying in with that special someone. this festive piece of underwear brings and energy to the affair that is nothing short of super-heroic.