Birkenstock - Boston Super Grip (Black Leather) - Men's: Boston Super Grip is the perfect clog for the working professional. Anti-slip, EVA and rubber outsole provides great traction on slippery services. Quality leather upper features adjustable instep buckle for a more personalized fit. Shock-absorbing cork footbed is suede lined to help wick away moisture. Raised toe bar is designed to encourage the natural gripping motion of your feet, exercise your legs and improve circulation. Footbed liner curves to ensure even weight distribution and proper arch support. Neutral heel cup keeps the foot's natural padding directly under the heel as nature intended.