WATERPROOF - Proven waterproof so you don't have to worry about showering, raining, swimming, etc. (no sensor) 14-DAY LONG-LASTING PROTECTION - Its reliable stick is guaranteed to last for 14 days. The adhesive is hypoallergenic and latex-free, leaving no residue on the skin even after 14 days. Non-Stick Center: It will not stick to your sensor, but protect around it in case you need to replace the patch, it will not cause damage to the sensor. Natural Cotton Material: This large size (2.95 inches in diameter) sensorless patch is made of natural cotton material, which is breathable, elastic and flexible. Ease of use: Easy to use by yourself without help from others. Shipment Quantity: 30 pieces Package Contents: Only the above package content, other products are not included. Size: 7*7cm (Reminder: The size is measured manually, please allow 1-2cm measurement error) Colour: Black (Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.) Products from LUOLV's store