It"s Waterproof - It"s proven to be waterproof, so you don"t need to worry about showering, raining, swimming, etc. (without sensor)14 DAYS LONG-WEAR PROTECTION - Its reliable stick guarantees long lasting 14 days. The adhesive is hypoallergenic and latex-free, leaving no residue on the skin even after 14 days.Non-stick center: it won"t stick to your sensor, but protect it around in case you need to replace the patch, it won"t cause damage to the sensor.NATURAL COTTON MATERIAL: This large size (3.15" diameter) free sensor patch is made of natural cotton material which is breathable, stretchy and flexible.EASY TO USE AND EASY TO READ: 3-part pre-cut paper, easy to use by yourself, without the help of others. Also, you can easily read from tape as usual.About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact usDuring the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shoppingThanks comptiable with your cooperation and we'll make you feel satisfied.