The La Sportiva Boulder X are technical approach shoes designed for uncharted routes when you need an extremely firm hold as you run._Designed to be suitable for technical routes and vie ferrata the Boulder X are multi purpose shoes, with a toe that works well when you need a good foothold when crag climbing._The hold comes from the thick and sticky Vibram sole with an effective inbuilt Impact Brake System which offers enhanced braking power for the descent journey, helping traction.__For comfort as well as performance the Boulder X also have a 2mm EVA insert which holds the foot firm and protects from shocks and impacts.__An additional rubber rand also ensures that the Boulder X are resistant to all the abrasion associated with trail routes and edging work whilst the suede and leather upper ensures the Boulder X look as good as they work away from the crag._The asymmetric lacing system ensures a personal protective fit for wear in the heat when your feet swell as well as in colder climates when they decrease in size. _