It's a domed acrylic crystal experience, leather-based strap, and a light-weight Develop that would make this view at ease have on during the day. Keep in mind: Acrylic crystal is not really as scratch-resistant as sapphire or mineral crystal; the leather-based band could show don a lot quicker than anticipated. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/