Part of the Castelli Race bags range, the Undersaddle Mini is the perfect bag for attaching to your road bike to carry some summer essentials. Super compact, this under-saddle seat pack can hold a few road inner tubes (18-25mm), a multi-tool, a spare link, and some folding cash. It attaches securely with a single strap that goes through the rails, so there's no need for a seatpost stabilizer. The strap uses a hook and loop fastener that can be trimmed at home and won't damage your shorts. The bag is weather resistant, although not completely waterproof. The zip has a silent pull and won't open during your ride. The rear has a reflective wordmark, and the lining is a vibrant red. Is there anything more you could ask for?

Key features:
- Water and stain resistant materials
- Water-resistant zipper
- Water resistant construction
- Adjustable hook and loop attachment strap
- Internal storage pocket
- Reflective accents
- External dimensions: 5 x 5 x 13cm (enough room for a Silca Italian Army Knife Tredici Bike Multi Tool or similar, 2 road bike inner tubes, a spare link, and some folding cash).

Please Note: This bag is water resistant, not waterproof. If you ride in heavy rain without mudguards, water may eventually get into the bag, so it's recommended to use a plastic zippy bag for added protection.