Most people who think they know how to swim really never master their water safety resting skills. This too often leads to early exhaustion and panic and a tragedy.There are a number of techniques this valuable 92 page book will teach you how to rest in water without expending a lot of your energy. In controlled experiments, subjects have been taught how to survival float for up to 36-48 hours Would you like to know how to do that? Then get this affordable book in the "Teach Yourself to Swim" series today and learn how.