Disposable adult Diapers are primarily of two types- the traditional nappy type & the pull on type (also called adult briefs and adult pants).
Choosing between the two types is usually determined by the condition of user. The pull-up type is for active persons who can wear their own diapers while the nappy type is better suited for people who require assistance in putting on a diaper.
Removal of both types of diapers is fairly straight forward. For the pull-up type, you can remove the diaper either by pulling it down or by tearing at the sides and removing it. For the nappy-type, once the sticky-tapes are removed, the diaper can be easily removed.
Note that adult diapers are largely unisex and are the same for both men and women.