The term 'Type of Mattress' can refer to two different types of mattresses: AIR and featherbed. An AIR mattress is an inflatable mattress made of vinyl or rubber that is filled with AIR. It is often used for camping or as a temporary sleeping solution. A featherbed is a mattress topper filled with down feathers, which provides extra cushioning and comfort. Both AIR and featherbed mattresses are popular choices for those looking for a comfortable night's sleep.