The Lezyne EX Caddy Saddle Bag is an expandable saddle bag that can pack more than you think. With the same initial appearance & size as the M Caddy the EX packs a deeper volume. The expandable zip section means that you can make the space for when you need to carry a few more tools or tubes on your adventures. if you are taking a light load out with you, you can do the expandable zip back up in order to save space. With taped zip seams & a water resistant back panel, to protect from tire spray, the EX has great water repellent properties. Detailed with reflective trim the Caddy helps to keep you seen on the roads at night. Overall the EX Caddy is a great saddle bag if you are always changing the content of your saddle bag to cater for the different rides you go on, relying on an ever changing saddle bag.