The Bear Grylls Survival 3729 model features a CARBONOX™ case - CARBONOX™ is a carbon-based material exclusive to Luminox which is light, hypoallergenic and extremely durable and resistant. All the Bear Grylls Survival Collection watches of this 3720 series feature Bear Grylls’ logo and motto, “Never Give Up,” on the dial, as well as a special two-tone caseback adorned with Grylls’ signature and “Never Give Up” in bright orange. This tactical watch comes with a rubber strap and has an orange diving zone count up marking.