Vintage Mchale and Company Custom Alpine Pack. Blue and Black heavy nylon. Top pack attaches in multiple positions allowing you to vary the volume as needed. I measure it at 42" tall at full empty extension by 14" wide by 10" depth. No rips, stains, or funky smells. All zippers and buckles work well.
Estate sale find and I don't know much about alpine gear but happy to answer any questions or send more photos if you need more info. I see prices all over for these so make me an offer.