A survival suit, or as it is more accurately and currently referred to as, an immersion suit, is a special type of waterproof dry suit that can protect the wearer from hypothermia if immersed in cold water, after abandoning a sinking or capsized vessel, especially in the open ocean. Immersion suits usually have built-in feet (boots), and a hood, and either built-in gloves or watertight wrist seals.
An adult immersion suit is often a large bulky one-size-fits-all design meant to fit a wide range of sizes. Survival suits are normally made out of red or bright fluorescent orange or yellow fire-retardant neoprene, for high visibility on the open sea. Gloves are built into the suit. These suits have a waterproof zipper in front for access.
  