Well I promised you the up-market Peak Design messenger bag and here it is: the Everyday Messenger 13. There is enough style in this one to satisfy any boutique bag buyer.
The choice of fabric from which it is constructed might be thought modest enough - a medium-brown denim - but then you need to look into some of the more up-market clothing shops to see what they do with ( and charge for ) denim. This is not a pair of jeans.
The basic messenger form with top flap is simple enough to think of but there are a number of design quirks in it. With the top flap down and locked, you still get a weatherproof zipper on top to allow access to the gear compartment. These used to be referred to as "stealth" opening by some makers, but anything that has a big zipper is not all that stealthy.
The sides of the case are open to small compartments - one of which has a Peak Design strap peeking from it. I've no idea what they expect you to suspend from it, but perhaps it is keys.
The top flap has an inside pocket that contains a Peak Design rubber ring that turns out to be a leg band for small tripods when you carry them horizontally.
The flap itself has a very ingenious attachment - the ladder segments on the side of the bag are made of metal and there is a powerful magnet and hook arrangement that locks them positively in a number of positions. You can gain quick access to the bag by lifting the metal handle with no fumbling for buckles or pop studs.
The interior space is massive, and they have made it decorative as well. The two movable partitions create what is essentially two quick-access buckets as soon as the top comes up - like holders for dragoon pistols on a European cavalry saddle.
The strap is very smooth woven nylon and the attachment points again feature a swivel but no resorting to plastic parts. There is a waist cinch hidden in a back compartment plus a re-enforced base to allow you to set it down without damaging the denim.
The whole thing costs $ 100 more than the Everyday Sling - not a great deal more to go up Collins Street to the fancy shops...just don't ask the price of the shoes in the window...