3mm Sheico Nylon NylonSheico is a great mid range neoprene that is soft and elastic Double lined: Double durability! This is the most durable combination you can get. Downside? It may not be as stretchy or soft as other combinations, as stretch will rely on the elasticity of the fabric. Lined outside: Lined wetsuits have the best durability. With your wetsuit lined on the outside, you can dive without worrying about accidental nicks and cuts tearing up your wetsuit. Lined