Fire up your engines with the PUMP! All-Access Trunk. Crafted with a micromesh and cotton blend, this hybrid underwear offers full support and comfort. The PUMP! All-Access Trunk fits like a typical boxer brief underwear, though the backless rear brings forth the playfulness, freedom, and added sex appeal of the Jockstrap. This truly is a new style underwear that is guaranteed to heat things up, for whatever the occasion.