Silca Mattone Ultimate Seat Pack

Every gram bolted, strapped, or stuffed onto a race bike gets scrutinized eventually, and the seat pack is usually where the compromise lands — you want your tube and CO2 within reach, but not a swaying brick hanging off the rails. The Mattone Ultimate from Silca forgoes traditional stitched canvas construction in favor of RF-welded exterior panels and TPU composite fabric, creating a seamless design with a smooth exterior that mounts closer to the saddle rails while limiting water entry points.

Featuring RF-welded TPU fabric, it mounts tightly to saddle rails and weighs just 44g, which is 50% lighter than the original Mattone. If you're the type who weighs your bottle cages and counts spoke grams, this is where a seat pack stops being dead weight. The welded panels do double duty here — no needle holes means fewer paths for water to sneak in, so the weight savings and the weather resistance come from the same construction choice.

Retention comes from the BOA Li2 dial rather than a hook-and-loop or ratchet strap. An upgrade over the original Mattone's standard dial and open guide loop, the low-profile metal dial and soft TX4 lace cable provide micro-adjustable compression that tightens around the pack's TPU body, pulling the entire pack upward to eliminate sway. As your contents shift over a ride, a quick turn of the dial snugs everything back up against the rails.... Read More