A French engineer has designed a pop-up “igloo” to serve as a waterproof shelter for homeless people in Paris. Made from polyethylene foam and lined with aluminium foil on the inside, the igloo keeps the occupant safe from freezing conditions as their body temperature heats the space up to 15 degrees warmer than outside. The igloo, which has solar lighting, is compact and foldable, and assembles easily in seconds. The design is washable, repairable and recyclable. The initial feedback is very positive and it is hoped that this innovative design will offer homeless people some privacy and safety away from over-crowded shelters or sleeping rough on the street.