Closed-cell foam pads are made from a type of foam where the cells are tightly sealed, preventing air and moisture from entering. This structure makes them lightweight, durable, and resistant to water, making them ideal for outdoor activities like camping and hiking. They provide excellent insulation and cushioning, helping to keep users warm and comfortable on cold surfaces. These pads are commonly used in various applications, including sleeping pads for camping, exercise mats for workouts, and insulation in construction. Their versatility and effectiveness make them a popular choice for both recreational and practical uses.