Waterproof spray is a protective coating designed to repel water from various surfaces. It is commonly used on materials like fabric, leather, and shoes to prevent moisture from soaking in. This spray creates a barrier that helps keep items dry, making it useful for outdoor gear and clothing. The application process is straightforward; users simply spray the product onto the desired surface and allow it to dry. Many waterproof sprays are also breathable, ensuring that air can still circulate while keeping water out. Popular brands include Nikwax and Scotchgard, which offer different formulations for specific materials.