This Ezra Blue Leather - Rubber Hybrid Performance Strap is perfect for those who value both style and functionality. Whether you're a fitness enthusiast hitting the gym for an intense workout or a professional attending a formal meeting, this strap is a great fit. It pairs a FKM rubber core with a calfskin leather upper layer. There's no specific size or weight mentioned, but it's designed to be comfortable on your wrist, with excellent ventilation that allows moisture to quickly evaporate, keeping your wrist dry and comfortable.