INDIANAPOLIS (BRAIN) — Silca’s Seat Roll is made from Martexin waxed duck canvas for a supple appearance and water resistance equivalent to leather. It can be re-waxed every few years to refresh waterproofing.
Three pockets can store a Silca Eolo CO2 regulator with two cartridges, an inner tube up to 700x30c, a pair of tire levers, patches and personal items like a credit card, cash or keys. Once rolled up, the kit fits snugly between the saddle rails and is held securely in place with a single strap. The design does not require use of a seatpost strap.
The Seat Roll is hand sewn in Los Angeles by Yanco and retails for $55.
More information here.