Jocko underwear - a revolution in men's underwear. Two sizes fit everyone in Jocko underwear. S/M is suggested for waist sizes 28 - 33, L/XL is suggested for 32 - 38. You won't believe the comfort, the breathability and more importantly, that you even have them on! When you try one pair of Jocko mens underwear you will want more Jocko underwear.! Jocko colors try white, black, green and navy Seamless 93% Nylon Microfiber / 7% Lycra Spandex - Made in USA. Great elasticity and breathability. Stretches to contour and conform without confining. Patented inline seamless technology. Intimate athletic apparel that feels so good, cool and breathable. Jocko underwear.