he Trango Extreme Evo Light GTX Boots by La Sportiva are technical mountaineering boots designed for the modern requirements of the alpinist, ice climber, and hiker: waterproof, lightweight, insulated, high performance. The ideal balance for people who want a light boot suitable for crampons.
Lightweight technical boot for all alpine pursuits
Abrasion-resistant and water-repellent Cordura upper
Water-repellent Lorica reinforcements with waterproof external coating
Gore-Tex//Duratherm lining membrane guarantees waterproofness and breathability
Innovative antishock HP3 midsole, Mountain Tech Suspension
Double rubber reinforcement on the toe box, double-density Vibram sole; easy to resole
Multidirectional hinge 3D Flex System allows incredible flexibility of the ankle and is made of waterproof Flex Tec 2
Lacing system features a lace lock that allows double tension
These are my first pair of technical mountaineering boots and I couldn't be happier. I bought them for a July climb of Mt Shasta which at that time of year would be about a 50-50 mix of rock vs snow & ice.
After getting them I went out on a 3-4 mile hike to see how they would feel on the approach and they proved perfectly comfortable on a mixed surface of dirt and rock. Compared to plastic double boots, these are so much more versatile and comfortable. The downside is that they won't be warm enough in really cold weather.
On the Shasta climb they worked out great, although I did get have to cover my heels with duct tape as they were showing signs of blisters at the end of the first day. On day two I finally got to try them out with my BD Sabretooth Pro crampons. With front and rear welts, the crampons lock in really tight and I can't see how they can possibly loosen or slip off.
This past winter I used them for some vertical ice climbing in upstate NY and they worked great for that as well. No problem with cold feet, although it was a fairly mild winter with temps around 20-25F on both days.
I can't speak to durability since I really haven't used them enough to put significant wear on them.