When your neck seal wares out your suit will leak like a sieve, a dry-suit is supposed to keep you dry, not get you wet. This neck seal, which is Trim-able to accommodate your neck size, can bring new and longer life to you dry-suit. The neck seal is made from durable Latex rubber for strength and durability. Neck seal can be used as a replacement for a damaged or worn Latex seal or to switch from a neoprene seal to latex. Neck seal can be used on the following Bare Dry Suits: Bare NEX-GEN Pro Dry Suit, and Bare Ultra Dry Suit.