The North Face Verto S4K is a lightweight summer mountaineering boot designed for warm weather climbs in the mountains where you will be moving over technical terrain. The Verto S4K has a flexible sole which allows you to walk more naturally than in a boot with a rigid sole. The upper cuff is very flexible which allows for more range of motion. It does not accept a step-in crampon, and needs to be used with a strap-on crampon. Comparable to the La Sportiva Trango S Evo - Men's, it is far less warm and supportive than other boots we evaluated, but is much lighter and better for moving far and fast.
The North Face has released an updated version of this boot: the Verto S4K GTX. Keep reading to check it out!