For calorie-rich backcountry sustenance, it’s hard to beat the classic PB&J sandwich. It’s simple, tasty, and can emerge completely edible after 12 hours in an overstuffed backpack. ProBar has taken this convenience factor one step further—and ramped up the health factor—by adding an Old School PB&J version to its line of whole food meal bars. This 370-calorie treat is tasty and filling, with a burgeoning medley of oats, nuts, seeds, fruit pieces, and chocolate chips complementing the core peanut butter and jelly flavor. Nine grams of protein and 17 grams of fat mean you’ll have ample energy for hours afterward. The only drawback is that it’s a bit heavy on the J portion—but being the PB fanatic that I am, I simply carry a small jar of Adams along and dip the ProBar in it. $3.29; theprobar.com.