Features: brand new and high quality Package Including:You will receive 50 pieces Sensor Adhesive Patches.Enough quantity will meet your different sports. Easy to use:Our Sensor covers are very easy to use like for Band-Aid.You just need to stick it on your skin. Premium Material:Our breathable material dries quickly and keeps the sweat and water from loosening your device. Waterproof: They have strong waterproof.You don'for t need to worry about shower, rain, swimming. Protect Sensor:It won'for t stick onto your sensor but protect around it well, in for case you need to change the patch, it brings no damage to the sensor. Specifications: Material: Elastic Fabric Size: Approx. 7x7.4 for cm/ 2.8x2.9 inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 50x Libre Sensor Covers