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Just got my seaskin membrane with options and early days yet but im pleased with it so far.
They do a sitech dry glove option but maybe cheaper to buy the ND ones mentioned here as they are easy to put on and lock (i found the latex seal dry gloves possibly the most cumbersome and irritating things to don and doff yet invented and went back to wet).

They will change to sitech or other valves if you ask them as well.