40 PACKS OF LONG-LASTING PATCHES - Our adhesive patches hold your sensor devices firmly against your skin and keep your sensors in safe condition. With proper care, one patch can last up to 10-14 days and 10-14 showers. With 40 pieces in an economical pack, it is the best value for your money. PREMIUM WATERPROOF & SWEATPROOF MATERIALS - Made of premium breathable materials, quick drying, waterproof and sweatproof. With these adhesive patches, you don't have to worry about the safety of your sensors in any water and sweat. Make your life easier. SKIN-FRIENDLY - The adhesive patches are hypoallergenic and latex-free, so they won't leave any residue on your skin even after long-term use. Our materials are comfortable and breathable. No irritation, no itching when using it, suitable for all skin types. EASY TO APPLY - Pre-cut backing paper makes it easy to peel and apply. No glue in the middle of the patches, which is convenient and won't damage your sensor when you need to change a new patch. PERFECT FOR LIBER SENSOR - The adhesive patches are perfect for Libre 1/2/3/Pro software, also compatible with Medtronic Guardian 3, Dexcom G6, G5, G4 and Enlite computers.