Features: Waterproof and breathable, allows your skin to breathe freely, while providing the best protections for sports sensor, make your sensor safe, beautiful and practical. Easy to stick, Just tear off the backing paper, you can stick it anywhere on your body, firm sticking, so you don't worry about falling off when you wear it in the shower. Made of waterproof 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. Fit for Libre1/2/3. You will receive 30 or 50pieces clear adhesive patches, enough to meet your needs for multiple quantities and different scenarios such as showering, swimming and sports. Specifications: Material:Adhesive Sticker Quantity:30Pcs,50Pcs (optional) Diameter:7.1cm/2.79'',9cm/3.54'' (optional) Package Includes: 30Pcs or 50Pcs Sensor Cover note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.