Liquid Onyx Moonshine Jock Briefs Black S/M from Male Power Underwear. The Liquid Onyx Moonshine is not for the faint of heart. Its jock briefs styling and cutout back expose just the right parts of your surfaces as you shine brightly throughout the Milky Way. Float on air or come down to earth, either way this one will leave you breathless. Additional product information: Fabric features Solid, Stretch, Wet Look. Material Nylon. Occasion Sexy. Style Jock Straps. Collections: Liquid Onyx, Valentine’s Day Gifts. Sizes available S/M, L/XL. Men sizes small to medium. Waist size 28 inches to 34 inches. Color Black. Fabric contents 85% Nylon, 15% Spandex. Care instructions: hand wash separately, cold water, line dry. Do not bleach.