Specifications:Silicone rubber replacement watch bands for Fitbit Ionic.This flexible rubber strap has a soft, comfortable surface that won& 39;t be ruined by moisture even when used by the most active Fitbit users.Ventilation holes offer extra breathability to minimize sweating.Own one of the sportiest replacement bands on the market.Item Name: Watch StrapMaterial: Silicone RubberFeatures: Perforated, Adjustable, Soft, Easy to Use42mm Strap Length: 137mm/5.39", 98mm/3.86" (Approx.)38mm Strap Length: 130mm/5.12", 98mm/3.86" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Watch Strap (The Watch Not Included)