Premium Quality: Made of high quality Soft Environmental silicone, No peculiar smell and harmless，No Extra Edge to hurt your hands. 20mm Silicone band for Fenix 8 43mm/Fenix 5S/5S Plus. Fit Securely: the 20mm Silicone band for Fenix 5S,Fenix 5S Plus,Fenix 7S,Fenix 6S,Fenix 6S Pro,D2 Delta S with secure clasp will protect it from slipping off, fits great and more securely when you biking or working out. Fit wrist : 6.30inches-7.87inches (160mm-200mm), please kindly measure your wrist before purchase. Convenient for daily wear: No extra screws needed, Just put on or take off the band by your hands，good for exercise or daily movement, super easy to switch bands. What we can promise to our customers is that we provide better quality products and customer services. Any problem with the item you receive or any opinion, please don't hesistate to contact us, we will find the best solution to solve.