SLR Boost's compact shape provides the perfect combination of comfort and performance \n Fibratek is Selle Italia's latest cover material offering supreme durability \n SuperFlow features a large anatomic central relief area which allows rider to sit comfortably and pedal efficiently \n Ti 316 7mm rails are hollow titanium, a balance of strength and light weight \n Become an idmatch dealer to fit the correct saddle to your customer. For more information on idmatch visit http://www.selleitalia.com/en/idmatchsystem/ \n L3: “Wide” intertrochanteric distance and high pelvic rotation (Flow and SuperFlow saddles) \n S3: “Narrow” intertrochanteric distance and high pelvic rotation (Flow and SuperFlow saddles) \n L1: “Wide” intertrochanteric distance and low pelvic rotation