Since there's no such thing as too much packing space. the ZDX 29” Large Expandable Spinner gives you more. with 2.5” of zippered expansion depth and Briggs & Riley's patented Outsider® handle for a flat. roomier interior. Lots of other thoughtful details include a Smartlink strap for connecting two bags. a roomy. gusseted outer pocket for a jacket and an easy-to-grab bottom handle. all designed to keep you and your stuff merrily rolling along.