This watch has features exclusively specified by Bear Grylls, the world’s most recognized face of survival and outdoor adventure, to make it useful to him and other adventurers. The Sea version comes in a CARBONOX™ case. The uni-directional turning bezel has a special diving zone count up marking, set off by a different color (blue or orange) for easy reading. The screw-down crown has an orange crown ring, for better grip, and the color matches the markings on the bezel and the minute and second hands (one of the most visible colors for underwater work). The SEA series comes with a waved black rubber strap.