A new titanium case adds lightweight durability to the high performing Khaki Navy BeLOWZERO. Water resistant to 100 bar (1,000 m) and equipped with a helium escape valve, this submarine-inspired watch is perfect for your next water adventure. The impressive 46mm titanium case treated with black PVD is the epitome of stealth style and features a special diving mask embossed on the case back.*Featured in The Martian (2015). Worn by Mark Watney, played by Matt Damon.*Featured in Tenet (2020). Worn by The Protagonist, played by John David Washington.KHAKI NAVYInspired by marine pioneers and designed with ocean explorers in mind, Hamilton's Khaki Navy collection is guaranteed to make a splash in the style stakes. SELF-WINDINGWrist movements cause the inner rotor to swing, transferring energy to the mainspring, and powering your timepiece.TITANIUM CASETitanium watches are lightweight, stronger than stainless steel and durable.SAPPHIRE CRYSTALSynthetic sapphire crystal is a tough scratch-resistant material, only diamonds could leave a mark. H-10 CALIBERA three-hand automatic movement boasting a superior power reserve of 80 hours and featuring a Nivachron™ balance spring. WATER RESISTANCEYour timepiece is resistant up to 100 bar (1000m) / 1450 psi (3280 ft).