If you’re in the hunt for a tough-as-nails watch that is noticeably unnoticeable, look no further than the Luminox F-117 Nighthawk 6400. Made with a low-key brushed black stainless steel, it’s beautifully stealthy and will be a welcomed addition to a military jacket and a pair of boots. With anti-reflective sapphire glass (for those “under-cover-of-darkness” missions), screw down crown, uni-directional diving bezel, 200 meter water resistance and tritium light tubes, the watch is all business. The 45mm case width isn’t for the weak-wristed, either, so keep shopping if hot yoga and lattes are your thing.

Buy Now: $1,000