Selle italia combo slr monolink flow saddlethe slr monolink flow made of an extra strong carbon fibre composite shell with a waterproof lorica microfibre covering the monolink carbon rails offer more room for adjustment than conventional rails mounted on a single monolink rail torsional strength is significantly increased this system offers you added benefits like greater front and rear saddle adjustability and innovative saddle geometry that favours free thigh movement while you pedal the