The 60 Pack Freestyle Sensor Covers for Libre 2/3 are waterproof sensor patches made of plastic material. These adhesive covers are suitable for camping and are sterile, ensuring cleanliness. With dimensions of 3.5 x 3.5 x 0.4 inches and a clear color, these sensor covers are designed for use with Libre3 sensors. The set includes 60 units, providing an ample supply for outdoor activities. Made in the United States, these sensor covers offer a reliable and convenient solution for keeping your sensor secure while on the go.