Messenger bags are my favorite style of gear bags. I’ve been carrying one for years. They are great because they are roomy enough to hold a lot of gear. But for those times when you don’t need to carry everything but the kitchen sink, they can be a little too spacious. The Setgo Jump Jet messenger bag has been designed to solve that issue because it can fold into a smaller bag and unfold when you need more capacity. The Jump Jet is made of reinforced nylon and features two internal pockets for organization, waterproof zippers, and a shoulder strap with a smartphone holder. When unfolded, the Setgo Jump Jet is large enough to hold Macbook, iPad and a notebook. It’s priced at $60 and is available through Setgo’s site.