The Filson Field Watch follows the three principles of military-issued watches: durability, precision and legibility. A reliable, accurate Swiss quartz movement was chosen for its longevity and maintenance-free operation. The rugged stainless-steel case, screw-down crown, and scratch-resistant sapphire crystal provide exceptional durability and a 100-meter water-resistant rating. The simple dial and Super-LumiNova® hands and markers make it easy to tell time at a glance – especially in low-light conditions. Nylon strap for lightweight strength.