Open-cell foam is a type of foam material characterized by its structure, where the cells or bubbles are interconnected. This design allows air and moisture to flow through the foam, making it lightweight and flexible. Open-cell foam is commonly used in applications like cushioning, insulation, and soundproofing due to its ability to absorb sound and provide comfort. In contrast to closed-cell foam, which has sealed cells that trap air, open-cell foam is more breathable. It is often found in products such as mattresses, pillows, and acoustic panels, where softness and airflow are essential for performance and comfort.