Waterproof and breathable, allows your skin to breathe freely, while providing the best protection for sports sensor, make your sensor , beautiful and practical. Easy to stick, Just tear off the backing paper, you can anywhere on your body, firm sticking, so you 't worry about falling off when you wear it in the shower. Made of high-quality elastic fabric material, close-fitting and comfortable, harmless to your body or skin, safe to use. You can use it with your sensor, and wearing the sensor for running, mountaineering and other activities. You will receive 30 pieces clear adhesive patches, enough to meet your needs for multiple quantities and different scenarios such as showering, swimming and sports. brand new and high quality Colour:transparent Material:TPU Size: Round: Diameter: 7cm Package Contents: 30 x Sensor Adhesive Patches 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.