So I was at IKEA the other day and saw a bag for only 7 bucks and thought... hmm... I could use this.
Got home, found an ski bag that was a gift (I don't ski, so kind of an odd gift) from my uncle in law. Cut a big square out of the ski bag, then got my supportive and kind wife to sew it onto the back of the 7 dollar bag we just got.
Being a broke student was my inspiration here. Oh, and I packed the bag with all my summer gear and it had room to spare. Hard to see, but it does have a hip strap too. It turned out much better than I thought, it feels just like a regular backpack, even with all the gear (I think the thick ski bag material helps).
Total weight: 445g
With this new pack, I might just be able to create my first UL gear list for you guys in the near future. I am also at the moment working on a DIY/MYOG summer sleeping bag, and once that is done, I estimate my base weight to be around 4.2kg.