This is the DUI ZipSeal, Neck/Hood Combo G1 Latex Replacement Seal for DrysuitsFeatures: Hood is 3 dimensional for a comfortable fit Latex neck seal inside can be trimmed to size Worn by divers wanting to keep their heads dry or for contaminated water conditions Should be worn with a hood liner Zip Seal Neck/Latex Hood Combination. Never miss a dive again! All DUI drysuits include patented DUI ZipSeals that allow you the ability to change out a spare seal in minutes. "