Can the basic bandanna, already one of the most versatile pieces of gear you’ll ever carry, actually be improved upon? Our tester says yes after hiking the AT with a Mapdana. Each 27″x27″ bandanna includes a color map and data that covers a quarter of the 2,174-mile A.T. path. Point-to-point and accrued mileage, distances to campsites and water, elevations, road crossings, and contact information for towns are all right there, albeit covered in sweat and trail dust. $13; 2 oz.www.antigravitygear.com.