The Mattone Ultimate is a minimalist, weatherproof 0.4L saddle pack. Featuring RF-welded TPU fabric, it mounts tightly to saddle rails and weighs just 44g, which is 50% lighter than the original Mattone. The high-performance BOA Li2 metal dial provides micro-adjustable compression to eliminate bag sway, while a YKK zipper and Hypalon strap ensure weather resistance and streamlined fitment.