It's a domed acrylic crystal encounter, leather strap, and a light-weight Make that will make this watch comfortable have on throughout the day. Keep in mind: Acrylic crystal just isn't as scratch-resistant as sapphire or mineral crystal; the leather-based band could display put on more quickly than expected. Quick Acquire: https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/