Compatibilitythese replacement straps are only compatible with Fitbit Versa 3 / Fitbit Sense Smartwatch (not a watch). Two sizes to choose from and adjustable length. Small: fits wrists from 5.5 - 7.2 inches (140 mm - 185 mm) in circumference; Large: for wrists from 6.5 inches - 8.5 inches (165 mm - 215 mm) in circumference Comfortable materialsmade of flexible and durable TPU material. It is abrasion-resistant, waterproof, allergy-free and breathable. Prevents skin irritation and provides you with a comfortable wearing experience. The silicone bracelets are easy to clean and maintain. Easy installationboth sides with intelligent watch ears and you can easily install the Versa 3 straps and also quickly remove with a button. The clasp design confirms that your watch sits firmly and securely on the wrist. Multi-colour combinationhave more types of colour combinations to choose from. The stylish colour and design can perfectly match your watch, personalise your Fitbit Versa 3. Great for outdoor, sports, business, parties etc. Customer ServiceIf the product you received has any problems, please contact us for the first time by email via "Contact Seller". We will deliver the best solution within 24 hours. Effortless replacement or money back during warranty.