Lifesaving overalls that not only keep a man afloat but warm and dry were introduced recently, and Capt. Erling Vorberg, skipper of a torpedoed Norwegian tanker, testifies these suits saved many lives on his ship. The suit is of rubberized twill, with a kapok jacket and heavy boots attached. It can be donned in a minute. Members of Captain Vorberg's crew were pulled from the water still warm and dry despite two hours' immersion, and the captain reported that his boatswain was rescued although floating unconscious, kept upright by the heavy boots in his overalls.