From their website...
Bird Hunting Vest with Hydration Systems.
The Quilomene Hunting Vest was originally designed in 1993. The intent was to produce a bird hunting vest that would fulfill the water and cargo requirements of an upland bird hunter who might be out from several hours to all day. It is the original, and still the best hydration hunting vest available today! An optional 120 oz. water system and nine cargo pockets (including a huge clothing pocket) give it the capacity to carry all that you might need for a long hunt. The fully adjustable waist belt-shoulder strap design allows you to carry most of the hunting vest weight on your waist. It balances the load maximizing your comfort and carrying capacity with a custom fit. The hunting vest is fully adjustable. Whether you are wearing shirt and pants in warm weather or layered up for colder weather this is truly an all-season hunting vest.
It's a size 30 (medium). I wear a size 36 pants and this fits me fine without a heavy coat. Sells new for $120, I'll take $75. Will ship on your dime. Read more about it at www.quilomene.com
I have used it some and it comes with bird blood, a few feathers, and some weed seeds at no extra charge.