The blue Luminox #tide ECO XS.8903.ECO series is crafted entirely from recycled #tide material for the case, strap, and bezel. It features a Swiss Made Ronda 515 quartz movement and Luminox Light Technology, which guarantees continuous illumination for up to 25 years under any lighting conditions. Additionally, the watch is water-resistant up to 200 meters. - Swiss Quartz - Approximately 50 Months Battery Life - Constant glow for up to 25 Years - 46mm Case Size - 14mm Case Thickness - 100% recycled ocean-bound plastic material Case and Strap - Sapphire Crystal - 200 Meters Water Resistant