Large Quantity There are 30 sensor patches in total, providing a sufficient supply for regular use. The patch consists of three parts, including backing paper, and is easy to apply precisely onto the sensor cover.Natural Cotton This large size (2.95 inches in diameter) sensor patch is made of cotton material, allowing the skin to breathe while offering stretchability and elasticity. Latex-free and hypoallergenic. The soft cotton material supports skin comfort and breathability. The adhesive patch is designed to be safe for skin use.Sensor Protection The waterproof adhesive patch adheres securely to the skin, is hypoallergenic and latex-free, and is designed to leave no residue even after extended wear up to 14 days.Non-sticky in the Middle The patch features a non-adhesive center to avoid contact with the sensor itself, protecting the surrounding area without interfering with the sensor. It allows for easy replacement without damaging the sensor, making it a reliable choice for skin and sensor protection.Wide Application The sensor patch is easy to apply independently without assistance. It is compatible with standard application methods. The sensor is waterproof, and the protective patch is suitable for use during showering, exercise, and other daily activities.