Castelli's Undersaddle XL Saddle Bag features a covered zip to shield against rain and wheel-spray. It's big enough for multiple spare tubes, a multitool, tire levers, an inflator, CO2 canisters, some patches, and even a minipump in the elasticized underside mesh section.
Features & Specs:
Bag Type: Saddle
Bag Capacity: 100 to 200 ci
I like the size and especially the pump holder. Materials are very good.
