<b>Feature: </b> <br><br>The fitbit charge 4 / charge 3 / charge 3 SE bands are made of pure silicone and flexible elastomer. Durable and soft silicone material across your wrist, improves airflow and comfort, bring you a comfortable wearing experience, Sweat & water resistant; <br><br><br>An Air-holes sport structure makes the band more breathable and lighter, specially design for Gym, Picnic, Swimming pool, Climbing, Hiking, Camping, Traveling.<br><br><br><b>Compatible Devices:</b> <br><br>Compatible with Fitbit Charge 4 / Charge 3 / Charge 3 SE<br><br><br><b>One-year Warranty:</b> <br><br>Every purchase is backed with 100% Satisfaction Guarantee. <br><br>If you receive defective products or have any problem, please feel free to message us. <br><br>We take care of you with free replacement or full refund immediately. <br><br><br><b>CONTACT Acrbiutu:</b> <br><br>1. Log onto your Amazon account and click on ""Orders"" <br><br>2. Click the title of our product and locate the page <br><br>3. Select any ""Size"" and click on ""Sold by Acrbiutu "" <br><br>4. Click ""Ask a question"" and select the subject of your issue <br><br>5. Click ""Writer message"", input your comments and send it to us.