Fizik Tempo Overcurve R4 Wide Shoes Advanced design, timeless versatility The Fizik Tempo Overcurve R4 Shoes employ decades of Fizik design to craft a performance-oriented road shoe that's versatile, ergonomic, and breathable, for the needs of every demanding rider. The Tempo Overcurve R4 Shoes are crafted using a resilient polyurethane laminated material over a breathable mesh, supporting the foot while increasing pedaling efficiency and airflow. The upper also uses an Overcurve design, which uses a staggered collar around the ankle to create an asymmetrical shape that better accommodates the rider's foot. The BOA Li2 dial quickly and precisely adjusts the tension across the foot for reduced hotspots. The R4 outsole combines nylon with 15% carbon fiber, for a moderately stiff pedaling platform, striking a balance of pedaling efficiency and long-ride comfort. The Fizik Tempo Overcurve R4 is a versatile road shoe, born with a high-performance pedigree. Features Wide sizing for riders with wider feet or those who want a bit more side-to-side space R4 Nylon Composite Outsole balances pedaling stiffness and power transfer with all-day comfort Overcurve shoe design uses a staggered collar around the ankle, creating an asymmetrical shape that better accommodates the bony structure of the foot BOA(R) Li2 adjustment dial for micro adjustment of the Overcurve wraparound upper, for a more comfortable fit with fewer hotspots Form-fitting construction with distinctive Fizik performance Microtex upper for a durable, resilient construction, and a supple feel for long-ride comfort SPECIFICATIONSUpper Material Microtex Closure type BOA(R) IP1 Dial with Velcro strap Cleat Compatibility Road (SPD-SL type)Intended Use Road, Road Race Sizing EUUS364 1/4375 1/437. 55 1/238638. 56 1/4396 3/439. 57407 1/240. 58418 1/441. 58 3/442942. 5942. 59 1/2439 3/443. 510 1/443. 510 1/44410 3/444. 5114511 1/245. 5114612 1/446. 512 1/24713 | Fi'zi:k | Tempo Overcurve R4 Wide Shoes Men's | Size 42 In Black/black | Nylon