I: CUSTOMIZED: Special manufacturer customized for Fitbit surge??owned mature technology?? price are more competitive with good quality</br>II: ENVIROMENTA: Using high quality silicone material?? Soft and flexible?? no irriation on human skins??super enviromental. you can wear it every day</br>III: SLIDE EASILY: Easy to take off or put on while fit fitbit surge very much?? match in 100%</br>IIII: OPTIONAL STYLE: Supply kinds of style and super cute ??and the optional color will make you are the unique and different. It will help you bring many admire.</br>V:ATTENTION: Only band cover?? not including fitness tracker or band or other parts</br></br>Prod