Mars suits consist of a sandwich of fabrics separated by a layer of vacuum. The inner layer is flocked with hollow fibres containing air which are also heating elements powered by the movements of the wearer or rechargeable electric cells. This is surrounded by a layer of foam. A reflective layer follows, which is black on the outside. There is then an evacuated layer consisting of rigid cells following the shape of the body, then another layer, black on both sides, made of an elastane amino acid polymer called neohooverene. These design features combine to produce a garment which can be comfortably worn with no other clothing on Mars during the day, and on Earth in cool or polar conditions including Antarctica and the Himalayas. They are also somewhat resistant to radiation, though not su