They provide outstanding traction on virtually any surface with confidence building lacing allowing you to eliminate all sandal-foot interplay. The total stack height is about 12mm including 4mm lugs equally distributed across the entire sole. The sole comprises a 1.8mm footbed made of textured non-slip Vibram rubber meaning your foot is firmly planted with each landing. Below this is a 3mm dense rubber foam layer giving you comfort on long trails. The outersole (the part the makes contact with the ground) is a tough yet pliable layer providing outstanding grip with its deep staggered lugs, and exceptional durability.