La Sportiva Trango S Evo Goretex is a modern multi-purpose lightweight mountaineering boot. It has a very low weight due to its use of innovative high-performance materials. A Gore-Tex membrane guarantees waterproofness and breathability. The lacing system has an additional lace lock that allows double tension. A very innovative '3D Flex' ankle provides power for front pointing, kicking steps in snow or standing on small edges when rock climbing.