Compatible with Fitbit Versa 3/Versa 4/Sense/Sense 2 watch bands (not include watch) This magnetic buckle Fitbit sense watch strap can keep your watch securely attached to your hand. It will not come loose even you're doing strenuous exercise like climbing or running. And you can easily adjust the strap length according to the wrist size. The new magnetic buckle design makes your nylon sense watch strap look more special and stylish. The Fitbit sports band is suitable for a variety of occasions, sports, leisure, business and etc. Premium nylon sport band is soft, comfortable, breathable, lightweight and durable. Let you have a comfortable wearing experience no matter when and where. You can wear different colors for different moods.