Waterproof canvas is a type of fabric that is commonly used to make tarps and tarpaulins. Tarps are large, waterproof sheets of fabric that are used for a variety of purposes, such as covering boats, providing shelter, or protecting items from the elements. Tarpaulins are similar to tarps, but they are usually made of a heavier material and have reinforced edges and grommets for easy attachment. Waterproof canvas is a durable and versatile material that can be used to make both tarps and tarpaulins.