La Sportiva Katana Lace Climbing Shoe. The Katana Lace from La Sportiva is similar to the original velcro closure version, but with the addition of P3 technology, which gives the shoe a downturned shape that will not flatten out over time. Like the velcro version, the Katana Lace is constructed from leather lined with Pacific in the forefoot, which provides toe knuckle comfort, and Dentex in the back to absorb sweat. Additionally, the Katana Lace has a Lorica toe box and an innovative powerhinge sole cutout to control and minimize forward stretch, as well as a slingshot rand to transfer power efficiently. The last on this shoe is relatively downturned, which makes the Katana Lace an excellent all around shoe for overhanging sport climbing, technical face climbing, gym climbing and bouldering.