Wider nose and slightly more padding than the 612 model. Ergowave shape offers higher performance thanks to optimal pressure distribution throughout the deep structures of the body. High end aggressive saddle designed for racing. Incorporates SQlab's unique design where the nose drops down away from the rear of the saddle, allowing for 55% of the rider's weight to be transferred to the ischial or "sit bones". K18 synthetic top, marathon foam padding with sidesItem Specifications: Rails, Carbon, Top, Synthetic, Color, Black, Size, 280x140, Model Name, 611, Weight, 157g,.