JJSOX Open-Back Briefs
These JJSOX Open-Back Briefs are both erotic and sporty. The jockstrap has a firm fit around the front to keep your manhood comfortably held in position. The rear of the briefs features an open back, leaving your cheeks free to enjoy the breeze. It's available in a two-color design, with a thick waist band that shimmers in the light, and a matching trim that follows the edges of the jockstrap.
I got two of these and I love them, they're just so hot.