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The Booster S is a super-light, ultra-sensitive shoe for bouldering and sport climbing. A one-third length Vibram® sole creates a flexible shoe that allows more natural movement through overhanging, thin routes. The Tri-tension rand enhances powerful movements through dynamic problems by concentrating the strength of the foot through an asymmetrical support ribbon; driving energy to the forefoot. All of this adds up to create an extremely sensitive, flexible shoe ideal for moving fast over technical, steep and overhanging rock.