REARFOOT GEL CUSHIONING SYSTEM - Attenuates shock during impact phase and allows for a smooth transition to midstance. TRUSSTIC SYSTEM - Reduces the weight of the sole unit while retaining the structural integrity of the shoe. SPEVA MIDSOLE MATERIAL - Improves bounce back characteristics and decreases midsole breakdown. ROCK PROTECTION PLATE - Provided protection against stone bruises. SPEVA 45 - Employs 45 degree SpEVA lasting material for a soft platform feel. TRAIL SPECIFIC OUTSOLE - Reversed lugs provide uphill and downhill traction on all types of terrain. ASYMMETRIC LACING DESIGN - An anatomically correct lacing environment that reduces potential for irritation and provides improved comfort and fit. INNER LOCK LACING - Provides ankle support and stability with two straps which become wrapped around the foot when the shoe is laced.