Neoprene Drysuits

Neoprene is a type of synthetic rubber, often also used in neck and wrist seals of drysuits. Neoprene can be specially prepared to contain millions of tiny enclosed air bubbles, forming a buoyant and thermally-insulating material. This is called "foamed neoprene" or "foam-neoprene".

All Northern Diver neoprene drysuits use crushed or rolled neoprene which makes them less susceptible to volume changes under pressure, as well as shrinkage.