Absorbent incontinence products come in a wide range of types (drip collectors, pads, underwear and adult diapers), each with varying capacities and sizes. The largest volume of products that is consumed falls into the lower absorbency range of products, and even when it comes to adult diapers, the cheapest and least absorbent brands are used the most. This is not because people choose to use the cheapest and least absorbent brands, but rather because medical facilities are the largest consumer of adult diapers, and they have requirements to change patients as often as every two hours. As such, they select products that meet their frequent-changing needs, rather than products that could be worn longer or more comfort.