Hot model Dionisio Heiderscheid, better known as D.O., puts aside his porn career for a bit to lend his wonderfully fit and sculpted body to PUMP! Underwear. D.O. is modeling PUMP!’s Fever Jock that is described as, “Red Mesh Jock-Strap .The cup is accented with Navy stitching and piping. The waist elastic is 50 mm wide, tri-color, Red, Navy and White, soft yet sturdy with ultimate stretchability and hold.” The jock retails for $22 USD and can be purchased from here. Photography by Rick Day. For more from PUMP! visit its website pumpunderwear.com and follow on Twitter @pumpunderwear.