Scarpa Jorasses Pro GTX Mountaineering Boot - Men's - 2010 BCS

Should be the same size as long as your using the same socks

Ken,
I speak from personal experience after a similar issue eight years ago. Insoles will help, but your foot will still shift forward, especially during a descent, or if your trying to kick into ice. This will result in blisters, foot fatigue and sore shins. My recommendation is, return them for a better size.

Yes they will be warm enough... if you think there will be an issue, replace/add a wool insole as most of the heat will be lost from the bottom of the foot instead of else where...

Steve, The Mont Blanc will actually have more ankle support. The Jorasses Pro is basically the lighter more nimble version of the Mont Blanc making it better for more difficult climbing but less supportive. The Mont Blanc is more general purpose and will provide more ankle support.

The Scarpas are a bit wider in the forefoot and the toe box. I have wide feet (E width) and am very pleased in the Jorasses Pro's.

Picked up a pair of these after trying them on and wow...very comfy and snug in the heal. I have narrow feet and noticed extra volume at the top of the foot. Donned a second pair of socks and problem solved. Second pair of socks did not hinder blood flow and my toes have stayed warm at single digit temps.

My experience is that they do run a bit wider than the Trango series.

If you're moving consistently... probably around 5-7F. If static, around 15F. If you want this for all around use (as many of us do), use a GTX gaiter which will add warmth to the lower leg, and make sure you have good circulation in the boot. Finding the right combination of lace tension, socks, and insoles is key to happy feet.

I have the Scarpa Summit, and find that when I'm in an inactive state for several minutes, my toes start to get chilled around 20-25. However, once on the move, they warm very quickly. I've worn the Summits on a few occasions in/around 5 degrees and while my feet weren't cold, I could definitely tell they were trending towards cold - this was while I was moving about hiking/climbing. According to your boot fit, you can boost the rating a bit with different socks, insoles and toe warmers.

I'd echo everything Simon said below but I'd be more liberal with a "guess" of 0-5°F as a low rating.

The short answer is about +15ºF.

The long answer is that there are so many different variables to rate boot warmth, that a number is almost meaningless. If boots could be rated to a number, manufacturers would surely do so. Factors that will affect your comfort include: whether or not your feet are dry, what socks you wear, how tightly the boots fit, your personal circulation in your extremities, what you're wearing on your legs, what you've eaten that morning and much more.

Boots like these, without a removable liner, are good for ice climbing and shorter mountaineering trips where they're less likely to get drenched and weight and fit are a primary concern. Once these are wet, though, they're going to be wet for the rest of your trip.

For longer expeditions, plastic or synthetic boots with removable liners that you can dry in your sleeping bag at night are the standard, and will result in much warmer feet.

These have a little straighter last compared the very asymetric last of the Freney. Heel and forefoot should be similar width, but the toe box has a bit more volume. Overall, it fits pretty much the same.