Sole structure particularly for climbing-boots

A sole structure particularly for rock climbing footwear comprising essentially a toe or front part and a heel or rear part, both said toe and heel having along the bottom perimeter thereof, substantially in the shape of a horseshoe, a plurality of first lugs extending substantially perpendicularly with respect to said perimeter, and internally to said perimeter a plurality of second lugs extending in a direction substantially perpendicular to said sole longitudinal direction, wherein said first lugs and the adjacent second lugs project from said sole with opposed inclinations with respect to a perpendicular direction to said sole, said first lugs provided on said front part of said sole being inclined opposite to said first lugs provided on said heel and said second lugs provided on said front part of said sole being inclined opposite to said second lugs provided on said heel.