Nothing kills the buzz of a trip faster than a bag breaking in baggage claim. Proper duffels should be lightweight, weather-proof, and sturdy enough to take a beating. Convenience matters, too. These days, many duffels can be converted into backpacks for when you hit the trails, and have smartly placed side pockets so you can access the important stuff without having to pull over. Here are the best high-performance duffel bags on the market.