The La Sportiva Genius Rock Shoe is a high-end lace-up climbing shoe with No-Edge technology, a construction method that allows for the elimination of "edges" on the sole of the shoe giving a more fluid, precise and harmonious feel. No-Edge technology delivers unparalleled edging performance on the rock P3 patented technology delivers mind bending power Lace-up comfort makes this shoe fit every type of foot La Sportiva Size Chart EU Sizing US Women&';s US Men&';s 34.5 4 3