They tweaked the designs of proven technology from years past to produce the Boulder X; Additional padding underfoot for long approaches and uber sticky rubber add deluxe comfort and performance * The Vibram Idro-Grip compound stays sticky on every type of rock even when wet * The all leather uppers and sticky rubber toe rands offer durable protection * Ideal protection and performance built for the rigors and abuse of the mountains * WEIGHT: 16.97 oz/ 481 g; LAST: Boulder