It's a domed acrylic crystal facial area, leather-based strap, and a light-weight Create that will make this look at at ease put on throughout the day. Have in mind: Acrylic crystal is not as scratch-resistant as sapphire or mineral crystal; the leather band could possibly present don quicker than envisioned. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/