Durable: These Sensor Covers are Made of TPU material, breathable and comfortable, leaves no residue on skin, waterproof, nonslip, stick more firmly. Waterproof: Adhesive Patches 11 x 7.8cm, Our adhesive patches are waterproof, both suitable for girls and boys, you are free to swim and all the water activities Protector: 't stick onto your sensor but protect around it well, it brings no damage to the sensor. Easy to use: The sensor covers are very easy to use. Simply and stick, you just need to on your skin, easy to cover any type of Your sensor. Transparent: These Sensor Adhesive Patches are transparent, invisible both suitable for girls and boys and keep your sensor look good. Colour:transparent Material:TPU Package Contents: 50 x Sensor Adhesive Patch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.