These La Sportiva Trango Tech GTX mountaineering boots have been in my possession for about 4 years. I’ve used them once. They don’t have any obvious signs of wear. They are too small for my feet, unfortunately. They work well with crampons, kept my feet dry throughout snow/glacier travel. Size: 37 EU/ 6 US From website: Boot that bridges the gap between mountaineering and backpacking Gore-Tex membrane blocks moisture to keep feet dry in the alpine Gusset free tongue offers comfort during long days in the mountains 3D Flex system offers precise support across rough, uneven terrain Low profile midsole and outsole allow technical footwork Vibram CUBE soles offer enhanced traction and edging capability Impact Brake System enhances comfort on strenuous descents To-the-toe lacing system offers a precise fit for enhanced control