Waterproof collar zipper. Closed bottom, open top.
YKK, Shelby
Ykk Water Zipper
Water-Resistant and Waterproof Zippers for Outdoor Applications - YKK Americas
Zipper 101 Presentation
AQUASEAL®
Ykk zipper identification. The manufacturer (stone glacier) says this is a heavy duty Ykk #10. Doesn't look like an aqua guard zipper. Can't find anything else like it online : r/myog
YKK, Shelby
Shelby
Ykk Water Zipper
Kayaking Dry suit with Detachable Hood Drysuits for Men in Cold Water (Latex Gaskets-Fabric Socks, XX-Small) : Sports & Outdoors
á Shelby
AQUASEAL® with Stainless Steel Slider
Caring for AquaGuard® and AQUASEAL® zippers - YKK Americas
60L YKK® Aquaseal® Zipped Dry Bag