Neoprene neck seal, surface style, which means that the seal does not have to be "inverted" like a diving type neoprene neck seal. A comfortable seal for surface suits although not quite as watertight as the latex standard seal we fit. Can reduce neck rash which some people surfer from when wearing seals for a period of time.
This is an option for a Delta drysuit. Should only be ordered if a Delta drysuit is also ordered.