It is made of High Quality TPU rather than Silicon. TPU Material is far better than Silicon Material: Cold-resistant, Oil-resistant, Water-resistant and Anti-sweat.It is comfortable, eco-friendly and safe for human skin. Yes, it is secure and easy to remove or install. Every products has undergone rigorous testing before packaging.We will pick out any defective products. No, It doesn’t. The replacement band is only compatible with fitbit charge 2 heart rate, which is newly released on Sep. 2016. Compatible with Fitbit Charge 2 ONLY – watch buckle designed with refined to fit the Fitbit Charge 2 and perfect replace your original band. High Quality Material: interchangeable accessory bands for Fitbit Charge 2 is made of flexible and durable elastomer material with surgical-grade stainless steel buckle. It is comfortable, eco-friendly and safe for the human skin. : 1 x Replacement TPU Band for Fitbit Charge 2 (Fitbit Charge 2 Heart Rate Monitors is not included) We devote ourself in providing 100% purchase satisfaction and the best service to our customers. If you have any problem, just e-mail us. We will get back to you within 12 hours, We will do whatever we could to make you happy.