Soft, durable, breathable silicone sports wristband makes it easy to go from work to the gym and everywhere in between Fitbit original accessories are designed for Fitbit products and tested for comfort and durability. Sporty and stylish to keep you comfortable all day - whether you're at the gym, in the pool or on the go. Made from soft, stain-resistant silicone. Large perforations make it airy and very comfortable to wear. The aluminum buckle keeps the bracelet in place even during really tough training sessions. Water resistant and can be worn in the rain, the shower and withstands both swimming and sweat. This bracelet is in size Large, which fits you with a wrist circumference of 18-22 cm and fits both Fitbit Versa 3, Versa 4, Sense and Sense 2.