The Waterproof Neoprene Neck Seal is special because it fits the Waterproof interchangeable seal system ISS with the standard silicone seals.

Would you prefer a neoprene neck seal? Then that is possible with this neoprene neck seal. A neoprene neck seal provides extra warmth on cold dives. This neck seal is made of a super stretchy Yamamoto 4000 neoprene (that won't tell you much, but that is the top quality neoprene).

It comes in 5 different sizes, all sizes fit in all Waterproof dry suits with an ISS system.

This neck seal also fits in Si-Tech and Quick Neck systems.