This day pack weighs only 3.75 ounces. It has adjustable straps, and a front mesh pocket for water bottles. Measures 20 x 18 x 4 inches deep.
Works really good for day hikes, and packing into luggage for air travel cause its so light and really packs into a small space.
Price is $25. Its brand new. Sold
I made one of these for a friend in Yellowstone. He was amazed how light it was, and that he could pack his jacket into it, along with several other things.
I feel the pack shouldn't weigh more than the stuff you're carrying.
See the sales page for ordering information. Sold