The Fizik Saddle Pack uses the unique Fizik clip system with no straps. A tab on the pack slides into the receptacle under the saddle shell. The ICS clip on the bag has three positions so you can customize the angle of the bag. The bag is made from water resistant material and zipper. It has a reflective safety patch and a tail light holding strap. Must have Fizik ICS compatible saddle to be able to use bag.
Saddles compatible with the ICS system (2007 version and newer):Aliante Carbon, Aliante Gamma, Arione Wing Flex, Pave HP, Vitesse HP, Gobi, Nisene HP, Rondine, Arione TRI2 Wing Flex, Vitesse TRI, Nisene CP,Pave CP, Vitesse CP, Rondine CP
Bought this bag recently, I ride on the normal roads but with some rough patches. In my secod ride out I bunny-hopped a pothole and the clip broke at the hinge that connects to the bag. It wasn't overloaded. I would not recommend unless you ride only on very smooth surfaces. I like the bag, so now I will go for the strap version.
Already had a Fizik saddle, so I thought I would try this pack to avoid the typical strap around the seat post that ends up leaving rub marks and often causing extra wear on my shorts. This pack solved these problems, but when I loaded it with a couple of tubes, a couple of CO2 cartridges and inflator, and tire irons, and rode on some rough paved roads, the plastic clip that inserts into the seat broke -- hit a pothole and the pack went flying onto the shoulder! I guess it would be OK with less weight, but that seemed like a normal load.