Castelli's line of packs and bags has proven popular for their style, features, and pure performance. it was only common sense that under saddle bags would be part of the equation. The Undersaddle Mini Pack is rectangular, with a sleek design that disappears under most saddles. It is affixed by a simple single hook and loop closure that wraps around the saddle rails. Highly water resistant material also fights oil and grease, as well as other road spray delights from staining the pack. The main opening zipper is a sealed affair, and blocks nearly all potential moisture when closed properly. An extended pull hangs from the zip itself, which has little garage when fully closed.

Castelli lines the interior bottom of the pack with red nylon, which stands out against the black exterior fabric, which makes it much easier to distinguish stored gear. A small internal mesh sleeve pocket is great for small items that you don't want to interfere with your tube, or get lost in the mix. The Mini holds just the essentials, perfect for most road riders. A simple Scorpion logo and reflective print accents add some flash, flair and safety. This clean-looking under saddle pack fits right in with the Castelli aesthetic and practical functionality found in their bag line. Though not waterproof, it blocks most water and is competitively priced, at a high level of overall quality in materials and construction.