red line Men's 50031YM-BB-01BL Boost Black Dial Black Silicone Watch Japanese quartz movement Mineral crystal; brushed black ion-plated stainless steel case; black silicone strap 60 second and 12 hour subdials; date function Black dial with gunmetal and purple hands and hour markers; luminous; black stainless steel crown with red accent Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving