These are cheap and have a nylon zip slider so no corrosion issues. My 6ft North midi fits the 6ft bag, just.
ebay.us/m/AE9Nhx
The omen board bag seems well made and works great if you want to use a bag while keeping your setup fully assembled. No zippers at all. With thinner mid lengths it has a little extra space side to side, but not enough to be a problem in use at all.
It's expensive and no idea if it makes sense outside of North America though.
omenfoils.com/collections/accessories/products/board-cover
So I couldn't hold back and got myself a skybrid in 5'9. It fits in my fbc midlength travel bag size s, but just barely. They do have bigger sizes, but I don't like the bag too much anyway. So I'm looking for something different where I can fit the board, 2 foils and 3 wings.
How has the experience with Ocean & Earth or Channel islands been?