Designed for a competition, the “Homeless Shelter” by designer Paul Elkins is a mobile shelter intended to fulfill the housing needs of the fast growing homeless society. Featuring a simple, lightweight (225 pounds) and watertight structure, the portable shelter not only provides refuge to the homeless at night but it can also be used to display and vend products during the day, so the homeless people could earn their livelihood. Equipping a small kitchen, toilet and furniture that folds to add extra space, the mobile unit gathers rainwater in a tank through a valve to meet water requirements of the occupants, allowing them to lead a sustainable lifestyle.