Selle Italia's SLR line of bike saddles fuses flexibility, resilience, and comfort to. Explore new paths with Selle Italia.Selle Italia SLR Boost Kit Carbonio Superflow SaddleDesigned for road performance use, the SLR Boost Kit Carbonio Superflow Race Bike Saddle is part of Selle Italia's SLR line of saddles. The SLR Boost provides lightness and comfort with performance. Its compact structure has a slight rise at the back for ideal placement of the ischial bones - so it improves the rider's power transfer and optimizes overall positioning. The Boost short nose bike saddle has been designed to increase comfort during hard pedaling efforts and allows easy weight transfer when it counts. It also has a special anatomic Superflow cut-out that relieves perineal pressure, helping to mitigate numbness and pain during longer rides.LightweightWhen selecting a bike saddle, you don't want to add weight to make your ride harder. This is why our road bike seat is made with Fibra-Tek, a sturdy microfiber cover that resists tearing and abrasion while guaranteeing a strong and durable lifetime at a very low weight. The shell, made from 30% carbon composite and high-grade nylon polymer, is lightweight, yet supportive. This road bicycle seat is made with a +10 mm longer 7 x 9 mm carbon rail to ensure lightness, resistance, and a wider range of regulation of the saddle. It's also easy to install on nearly any road bike.idmatchidmatch uses a strict scientific method to help you to find the size, alignment, and equipment that fits your physical shape. This saddle is an S3/L3 for those who have been fitted for a Selle Italia saddle.SLR Boost Kit Carbonio Superflow Saddle SpecificationsWeight: S3: 4.3 oz (122 g); L3: 4.6 oz (129 g)Cover: Fibra-TekSize: S3: 9.76” x 5.12” (248 x 130mm); L3: 9.76” x 5.71” (248 x 145mm)Rail: Carbon 7x9 mm (+10 mm)Color: Black