A waterproof Post-it note is a sticker with a waterproof function, usually used to attach to the surface of an object to prevent moisture penetration or damage. They are usually made of a waterproof material, such as plastic or rubber, with a strong adhesive back that adheres firmly to a variety of surfaces. Waterproof Post-it notes have a variety of uses. They can be used in a home, office or business environment to protect files, folders, laptops, mobile phones and more from moisture. In outdoor activities, waterproof post-it notes can be used to protect luggage, tents, backpacks and other items from rain or moisture. Waterproof Post-it notes can also be used for water sports and outdoor sports. For example, during water activities such as surfing, swimming or rafting, waterproof post-it notes can be used to protect items such as mobile phones, wallets, keys and so on from water damage. Waterproof Post-it notes can be used to protect maps, compasses, cell phones or other important items during outdoor activities such as hiking, camping or mountaineering. Waterproof Post-it notes usually have water resistance and wear resistance, which can maintain the stickiness and waterproof properties of the sticker for a long time. They can also be easily clipped and resized as needed to fit objects of different sizes and shapes.