La Sportiva calls the Genius Climbing Shoe its highest performing shoe for boulderers, sport climbers, and overhanging aficionados. The Genius gains its high performance through a No Edge technology rubber overlay over the toe, which grips on edges and make believe footholds like they were ledges. This remarkable technology lets you place your feet quicker and more efficiently, without having to readjust because No Edge feels that good on the first step. The Genius also features La Sportiva's mind bending P3 technology that made the Solution one of the most popular shoes today. P3 uses a Permanent Power Platform to maintain the Genius' aggressive downturn for life. Like the Testarossa, the Genius' heel is surprisingly soft, stretchy, and sensitive for a proper fit as well as solid heel hooking. Vibram gave the Genius its hardest and stickiest XS Grip rubber to match its high performance. The thin sole works with the LaspoFlex midsole to keep the Genius malleable and flexible like most professional grade high performance climbing shoes these days. La Sportiva left the upper unlined so your foot can slide into the soft and smooth suede upper, and the microfiber tongue gusset adds soft, lightly padded comfort.