This year Mike is using a new Gregory Baltoro backpack.
Quick review: 1) He went to a size small this time (he's been measured on the line between medium and small.) That seemed to work. At least, the pack can't keep sliding down after a certain point is reached. 2) It weighs slightly more than Mike would like. But this is offset, somewhat, by the better fit. 3) Adding to the overall weight, but adding to the functionality, there are three exterior pockets. Mike found these to be very useful!
So, no whining as in years past.
Photo: Gregory Baltoro Backpack—Point Reyes, 2010