- The latest in novel workout wear can be found in this design exclusively by AMERICAN JOCK! This short has a unique built-in jockstrap configuration (not removable) to cup your privates in comfort along with a 12" side seam for ultimate mobility and contrast trim for an athletic look. Inner drawcord waist easily adjusts the level of comfort you desire. Made in U S A. Outer part of short is 100% breathable flat mesh polyester. Jock made of 90% cotton 10% lycra.