The Selle San Marco Aspide (Xslite rails) is an exciting mix of function and form with its unmistakeable design has made it a true icon and a favourite of numerous professionals and amateurs alike. The Carbon Fibre Reinforced Plastic shell is light and strong and is designed to maintain its' shape over time whilst the BioFoam padding is San Marco's solution to obtaining better comfort with gel inserts while maintaining low weight and longevity. The Microfeel covering is breathable and hard wearing and helps bring the weight in at just 165 g