The Master Carbon SEAL Automatic features a CARBONOX™ case. a ground-breaking material that is light. durable. hypoallergenic. weatherproof. and shock and scratch resistant. Combining all the details for which Luminox is famous - toughness. luminosity. extreme water resistant. legibility. plus an automatic movement that also features a day and date window. To show off the mechanical movement powering this timepiece. Luminox has added an exhibition case back to show off the movement and automatic rotor. A steely grey Cut-To-Fit rubber strap complements the black dial with grey details.