If deserts, rain forests or mountains are on the itinerary, make sure the Supplex Road Trip Cap from Jack Wolfskin is on the packing list. This baseball cap gives you reliable protection from the sun's ultraviolet rays. It packs down small so you can stash it in your bag. The light Supplex nylon fabric is very fast wicking–an attribute you will certainly appreciate in hot weather. To enhance the climate comfort, it has an airy mesh lining. This provides good ventilation and has advanced moisture management properties.