Wow, got a chlorinated, 0.25mm thick version with attached socks and round collar option, absolutely loving it... trying my best to wear it whenever I can! I wonder how the non chlorinated version feels like...
We have a lot of zippers on our products here and a lot of options for zippers. A lot of times our patterns come with a pre-set selection, but we can customize more. Locking, WaterTight and even air-tight zippers are sometimes requested as customization features. You can always ask for a quote for something via the "I'd like to customize this product" link on any page. Meanwhile, here's a simple picture to explain the type of zippers and what they are called.