We have some great dive bags but this one is our top performer.  The main compartment is roomy enough for a complete set of dive gear + more.

High density foam padded shoulder straps.   Built-in full length dry bag. Side zipper so you don't have to unpack the bag to get items at the bottom.    2 Carry handles I like the separate Fin pocket behind the dry bag. Super tough Mesh with a reinforced bottom that drains well.   It has a front pocket for your items you won’t to get to quick like your defog, earplugs, sunblock, scuba tool, etc. Also comes with a separate smaller mesh bag for packing out wet items after the dive.  

I did a review for 5280 Scuba on this product. You can view it here.