The Colnago SLR Flow carbon saddle features a carbon rail which reduces the weight dramatically and also has a cut out in the middle of the seat which relieves pressure in the center of your seating area giving you more comfort while sitting. This is a huge plus especially if you are in the saddle a lot, a cut out can reduce the numbness you might experience and help to keep your body in top performing ability. The saddle is available in either black or white and is useable with any of your Colnago seat posts. At only 115 grams this saddle will lighten your bike quite a bit and it also makes a statement. The SLR saddle is a great upgrade to any Colnago bike and should help provide a comfortable riding experience. Manufactured be Selle Italia and made in Italy this really is a genuine Italian Colnago saddle.