PACKAGE INCLUDES - You will get 30 free round sensor covers in size 7x7x0.04cm/2.76x2.76x0.02inch. Sufficient amount of freestyle libre sensor cover will meet daily needs while swimming, showering and sports, sweating. WATERPROOF AND BREATHABLE - Made of TPU material, freestyle libre sensor stickers are soft and thin, waterproof and breathable. Libre sensor covers will prevent your sensor from being disturbed by water or sweat. DO NOT STICK TO SENSOR - No hole or glue in the center of the Freestyle Libre sensor cover, which does not will not stick on your sensor but will protect around it. Libre sensor patches will make your sensor safe, beautiful and practical. (Note: sensor not included in the package) EASY TO STICK AND READ - There is pre-cut paper in the free sensor covers, easy to use. With self-adhesive material except the hole, it is easy to stick. The transparent cover of the Freestyle Libre sensor will allow you to read the tape easily. SAFE HYPOALLERGENIC - The free sensor sticker is made of natural cotton, latex-free acrylic adhesive, breathable and comfortable, leaves no residue on the skin.