Originally Posted by
bobcrotch
This is what I use. Mine only has one shoulder strap though, my ex gave it to me a long time ago in singular strap form. Works very well, no back pains or anything. The weight distribution is freaking awesome. I was going to buy a larger backpack or messenger bag but screw that. I'm keeping this for my 'tool bag' and quick trip bag and getting a pannier setup for anything that wont fit in it.
Also the newer models (
http://www.mountainsmith.com/product...bCategory2Id=0 check Mountain Smith's website) are *much* cooler than this. A lot more er, ergonomic, I guess you could say. They look a lot more comfy than the version I have (which I believe is about 6 years old or so). Not to say mine isn't comfortable, but when loaded down beyond what I would say is the suggested carry weight it kind of sucks, but it would in any bag really.
Edit: It's called the Mountain Smith Day or Mountain Smith Day Daypack

I have this same bag only in purple rather than red. Had it in college for walking around campus and recently resurrected it as my 'small' commuting bag. The double straps in the photo are an extra that replace the single shoulder strap. They're about $20 and really make it a better commuter option.
The pack is super adjustable to move the load around on your back/waist and make it as comfortable as possible.