45mm Carbon Composite Case and 60-click Unidirectional Ratcheting Dive Timing Bezel 316L Stainless Steel Screw-in Embossed Signature Caseback 316L Stainless Steel Screw-in Crown with Multiple O-rings. Crown color matches dial color. Sapphire Crystal with Antireflective Coating (for glare-free viewing) Water Resistant to 300 Meters (all watches tested in both air and water) Dependable Japanese Citizen/Miyota 2035 Quartz 3-Hand Movement (with 4-year battery) Genuine Rubber Strap (22mm x 20mm) with Steel Signature Buckle (with easy on/off quick release spring pins). Blue, Yellow, and Orange Straps sold separately. Swiss Self-powered Pro-Glo T100 Illumination System Glows Continuously for 25 Years (no need to be "charged" by an external light source, and glows 100X time brighter than conventional photoluminescent lume systems) Weight: 82 grams, Lug width: 22mm