There are various types of big air bags available for BMX riders. One popular type is the foam pit airbag, which is typically made of durable vinyl and filled with foam cubes. These airbags provide a soft landing surface, allowing riders to practice and perfect their tricks without the risk of injury. Another type is the inflatable airbag, which is made of high-strength materials and can be easily inflated and deflated for transportation and storage. These airbags are often used in events and competitions, providing a safe landing zone for riders performing high-flying tricks.