People who are bedridden or in wheelchairs, including those with good bowel and bladder control, may also wear diapers because they are unable to access the toilet independently. Those with cognitive impairment, such as dementia , may require diapers because they may not recognize their need to reach a toilet. Men's and women's adult diapers in the form of underpants. 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.