Large, high quality SUP backpack
Purchased the ATB board bag after the one that came with my board fell apart. It's pricey but it looks pretty well built and feels good quality. There is plenty of room for my 11'4" tourer along with paddle, fins, buoyancy aid and other stuff. The padded straps and solid base with wheels make it easy and comfortable to move around. It would be ideal if you need to take your board on a flight or similar. The drawback is that it also makes the bag itself quite bulky, which means it's going to be difficult to stash on the board on expeditions. There is also lots of padding that could make it vulnerable to mildew if stored in damp conditions (if, like me, you keep your board in the garage).