The Fizik Saddle Pak is the standard, non-ICS version of Fizik's Medium sized ICS bag. However, it supports all saddles using a velcro strap system to connect to the rails and seatpost. This allows you to use the Fizik Saddle Pak on Fizik saddles without ICS (pre 2007) and on any standard saddle out there.
The Fizik Saddle Pak is a great looking pack that fits clean and secure, and it comes in one size. The bag is good for your basics: one tube, two CO2’s, and a tire lever plus room for an extra tube or an inflator head, multi tool, and maybe even a patch kit.
The bag is waterproof and the zipper enclosure is reinforced for added water resistance, but we still recommend taking your tubes out of the boxes and putting them in ziplock baggies so the cardboard boxes don’t turn into a disgusting mess (just in case).
The Fizik Saddle Pak is compatible with any saddle with standard rails.