Mystery ranch hot speed deals pack

Product Name: Mystery ranch hot speed deals pack
I bought this to use for bird hunting hoping it would be more comfortable than my hunting vest for big days in the field but as time went on I decided it wasn't going to work like I thought it was due to the padding on where the Butt of my shotgun goes. The waist says 39 plus but I wear a 34 and it fits just fine I'm not sure how they come up with their sizing. I'm 5 foot 11 inches and 190 pounds and it fits me good. I can't find the bladder that was supposed to come with it so the bladder is not included. But otherwise it's brand new with deals tags.