👉 Skis are lightweight, flexible, and snowboard-like devices that are used to propel a person or other object down slopes. They are typically made of synthetic material such as nylon, polyester, or even wood, but they can also be made from a variety of materials like aluminum or fiberglass. Skis are often designed with a wide range of features and functions, including the ability to glide, turn, and propel themselves up slopes.