Highly recommend this item. I suggest taking the time to get custom fit. The manufacturing, including reinforced seams, measurements, attention to detail is superb.
I've purchased lesser quality from other retailers and had pressure points or 'pinch' points with the stirrup area but not so with Catfish. These leggings are very comfortable, even for long periods of time.
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.