Koa's inherent properties naturally elevate, embolden, and inspire all those who come into contact with it. In the Hawaiian language, "Koa" means fearless, and the wood of choice for warriors. WOOD ORIGIN: The largest native tree in the Hawaiian Islands. the Acacia Koa is truly the monarch of the forest, often reaching heights of 100 feet. WOOD TYPE: All-Natural Hawaiian Koa WoodSTEEL DETAILS: 316L Stonewashed Silver Stainless SteelGLASS: Mineral Crystal GlassWATER RESISTANCE: Water Resistant CasingMOVEMENT: Japanese Miyota Citizen QuartzCLASP: Double Locking Fold-Over ClaspTrees For The Future - We plant 1 tree for each watch sold, which helps feed families, provide jobs and change lives around the world.