Its Waterproof - Its proven to be waterproof, so you dont need to worry about showering, raining, swimming, etc. (without sensor)<br> 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.<br> Non-stick center: it wont stick to your sensor, but protect it around in case you need to replace the patch, it wont cause damage to the sensor.<br> NATURAL COTTON MATERIAL: This large size (3.15 diameter) free sensor patch is made of natural cotton material which is breathable, stretchy and flexible.<br> 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.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store