Compatible Models PIOWNN nylon velcro strap compatible with Fitbit Versa 4/Fitbit Versa 3/Fitbit Sense 2/Fitbit Sense (Note: Strap only, Fitbit Smartwatch not included) Velcro Hook & Loop Design This trail loop sport strap for fitbit versa 3 straps features a new unique velcro design that is adhesive and strong enough to stay securely on your wrist; it comes with a hook and loop fastener that allows for easy sizing in an instant for a perfect fit. Fits wrists from 5.7"-8.7"(145mm - 220mm) Premium Soft Nylon Made of high-quality woven nylon, the versa 3 strap is soft and skin-friendly, lightweight and breathable, won't irritate your skin, comfortable to wear. It's not only suitable for everyday wear, but also for fitness, running, water sports, hiking, trekking, rock climbing and other outdoor adventures. Secure & Easy to Install The connector on both ends of sense 2 strap is precisely and tightly fitted to the Fitbit smartwatch, holding it securely in place, no need to worry about falling off. Easy to install and remove with one click without additional tools