Compatible Models: The bands only compatible with Fitbit Inspire 3 Tracker Smart Watch. Premium Material: The bands are made of high quality silicone material, flexible, lightweight and very comfortable to wear. Two Sizes: Small size for 5.5" - 8.1" wrist, Large Size for 6.1" -9.1" wrist.To make sure you get the right size, check your wrist size before buying Easy to install: Freely adjust to fit your wrist size,without any additional tools.Secure enough to avoid the falling off. Easy and simple installation or removal. Multi Colors: A variety of color choices, you can match according to the occasion, mood, clothes, wear your charm.