Given the current gear that is out there, a "powder ski", as defined by both the marketing hype and the functional use of the tool, is something 90mm+. In fact most are like 100+. I am not a super-rad-youngin and I used to ski pow on my Rosi 4S slalom planks and I know that is fun and possible. Just that now, given the current equipment, you cannot call R:11 or R:Ex a powder ski. That is like calling a honda accord an SUV. Just cause you can ski pow on a skinny ski doesn't make the ski a pow ski, it makes the skier able to ski powder. I used to justify my skinny planks as better for the "regular" days, but fact is I was wrong. I see that now.