Packing for a tropical getaway usually only involves deciding what color swim trunks to pack. But when your plans include jungle hiking, cave exploration and scuba diving, things get a little more complicated. The key is versatility — you need gear that works underground or underwater just as well as it does topside. For our week in Belize we made sure everything we took did more than just one thing well. This saved space in our luggage and let us be nimble yet well prepared. Here’s a sampling of what we took.