The Neck Seal

The neck seal is a StretchTex material that has a supple, skin on skin feeling and makes a seal on your neck by the air inside the suit. It's very durable because the opposite side of the skin is a nylon material that is tough and will not tear or run as latex does. Plus, the StretchTex works on air compression, which is much more comfortable and forgiving than latex seals that work by constriction.