Dynafit ZZero 4 PX-TF Alpine Touring Boot - 2007 BCS

I have only got to do a couple trips so far but they are very comfortable for the way up and so far seem to do fine for the ride down.I am 5'9'' and 150 and wouldn't consider myself as a real aggressive skier. I would definitely recommend these for a smaller framed skier.

Hi! I am French and I live in Maine, so forgive my English.
Those boots are my 5th Dynafit AT boots.
I usually prefer light weight for long trips and an easy uphill. I began to ski when I was 5 years old.
Those boots are the best I have ever had: still light, but more rigid than the race models, very comfortable uphill, and hot.
They are clearly softer than the carbon model, but I think it's a perfect compromise.
I have wide feet, so I had to choose 29 instead of 28.5, because they fit a little bit more narrow than the other Dynafit I had. Its downhill skills are far better than all I have seen before in the brand.
Conclusion: they feel rather like perfect all abilities touring boots than pure freeride.

So, backcountry, you made a little mistake that may mislead a shopping customer. The weight listed as: 8lb 7.6 oz is so far off, its not even funny (this would make this boot one of the heaviest AT boot on the market). Do the conversion for the listed 3180g and you get a slim and sexy weight of 7.01 lbs. Don't be mislead by the carbon version of this boot either (the carbon strip is for strength and rigidity not weight saving) for this boot is a whooping 10g lighter. Dynafit says "Compared with other boots on the market, this is the lightest 4-buckle Ski Touring boot in the world."

Boom, roasted.

It was my first pair of AT boot's and i could not have asked for a better pair, i brought them on a Sunday and used them the next morning on the Haut Rout in France (Chamonix-Zermat 115miles 6days) .
I had no problems no blisters the perfect boot!

If you are looking for a light weight, comfortable boot with good downhill control then these are the boots for you.

Well done Dynafit

First real use of these was a five mile skin over rolling terrain, at which point I replaced the skis with crampons and did a 2,000 climb (WI2), descended the same route, and skied out. All in: 10 hours in the boot and nary a problem.

I've only had these boots for a few days in the backcountry so far. I'm very happy so far. They're the lightest 4-buckle boot in the world (lighter than the carbon). They're stiff enough for me (5'8", 147#, agressive skier), but if you're heavier or taller, you might want to go stiffer (ie Zzero 4 carbon or Zzeus). They're very comfortable for my feet. Match them with Dynafit bindings and agro skis and you'll be happy.
As far as touring performance goes, the tour mode seems fine to me. They don't tour like a 3-buckle boot, but also better than a heavy overlap boot. Backward cuff motion isn't an problem if you are skinning UP HILL.

Compared to similar Dynafit-compatible boots by other brands, these boots seem to have limited backwards cuff motion in tour mode. The result is that you can't stand up straight in them while skinning, and your weight ends up being carried by muscle tension instead of your skeleton. This is subtle and may only matter for those who do very big days. In terms of weight, construction, and ski performance, the boots are excellent.