<b>Material: </b> <br><br>Those bands are made of skin-friendly and odorless elastomer, prevents skin from irritation; durable, soft, sweat and water resistant, keeps your wrist comfortable during high intensity workouts. <br><br><br><b>Compatible Devices:</b> <br><br>Compatible with Apple watch 38mm 40mm SE, Series 6, Series 5, Series 4, Series 3, Series 2, Series 1 <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.