Closed-cell foam is a type of foam material characterized by its structure, where the cells are completely enclosed and do not allow air or moisture to pass through. This makes it denser and more rigid compared to open-cell foam. Closed-cell foam is commonly used in applications such as insulation, flotation devices, and padding due to its durability and resistance to water. One of the key benefits of closed-cell foam is its excellent thermal insulation properties, which help maintain temperature and reduce energy costs. Additionally, it is often used in products like yoga mats, sleeping pads, and protective gear because it provides cushioning and support while being lightweight and easy to handle.