• Special edition soft silicone strap compatible with Fitbit Charge 3 and Charge 4 • Perfect fit for large wrists from 17 to 20.5 cm • Easy installation and removal, freely adjustable, breathable, and comfortable • Made with high-quality materials, more comfortable and flexible than the original band • Water and sweat resistant, hypoallergenic, suitable for both indoor and outdoor sports activities • Ideal for daily use at home, in the office, or during workouts • Includes 1 sports silicone strap (tracker not included) • Color may vary slightly depending on monitor calibration • Excellent gift option for friends and family who use Fitbit Charge 3 or Charge 4