Rubber anti-gravity suit made by the Aviation Division of the Dunlop Rubber Co Ltd, worn by pilots during test flights. The first gravity suit, the Franks Flying Suit Mk II, was invented by Canadian scientist Wilbur Franks, and was first used during WWII. The suit is an overall designed to cover the legs and abdomen, consisting of two layers of rubber with water between. When laced tightly to the body, it prevents blood rushing to the head. This stops the pilot from blacking out when experiencing extreme g-force.
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