A dry suit zipper is the same type of zipper used on:

A dry suit zipper is typically a specialized type designed to keep water out while providing flexibility and durability. The correct choice is that it is the same type of zipper used on space suits. Space suits require zippers that can withstand extreme conditions, including high pressures and potential exposure to water, just like dry suits do. This kind of zipper is engineered for waterproofing and tends to be much larger and sturdier than conventional zippers to ensure a reliable seal under challenging environments.

The other options are not equivalent because, while tents and industrial welding curtains may use robust zippers, they do not need the same level of water resistance and pressure management as dry suits or space suits require. Diving duffle bags, on the other hand, utilize zippers designed for ease of use and storage but lack the specific waterproofing properties needed for dry diving suits and space suits.