SDG Skylite I-Beam Saddles: A smaller and lighter version of the popular I-Sky. The SkyLite allows riders to move around on the bike with more freedom. The SkyLite also uses SDG’s patented I-Beam System which utilizes the latest DuPont®nylon fiber composite material to create an extremely light and unbelievably strong saddle, while saving you half a pound compared to similar railed saddles.