Open-cell foam is a type of foam material characterized by its interconnected cells, which create a soft and flexible structure. This design allows air and moisture to pass through easily, making it lightweight and breathable. Open-cell foam is commonly used in applications like mattresses, cushions, and soundproofing materials due to its comfort and sound-absorbing properties. Unlike closed-cell foam, which has sealed cells that provide insulation and water resistance, open-cell foam is more porous. This porosity makes it less effective for insulation but ideal for applications where airflow is important. It is often found in furniture, acoustic panels, and packaging materials.