1、FLEXIBLE FIT: Our straps fit most watches and smartwatches. Just make sure your watch is the right size, will comfortably fit most men and women.2、QUICK RELEASE: You just need to attach your original watch spring strap, then slide the built in quick release lever in our nylon strap to install it out. No tools are needed.3、STURDY AND DURABLE: Use two layers of durable 2mm thick nylon to make the straps, and a heavy stitched process with stainless steel clasps, sturdy and thick.4、COMFORTABLE TO WEAR:  When you first start using it, it may take some time to get used to it. But once you start wearing it, the strap starts to take on the curvy shape of your wrist and become very comfortable.5、MATERIAL: Canvas is durable, soft, breathable. And nylon material with good density, lightweight, washable. The lines are neat simple and generous.