Barefoot running can be a terrific way to build strength in your feet and boost your overall balance. You may not want to go shoeless on the gym track, however, and that’s where barefoot-technology shoes come in handy. With the Nike Free, your foot gets all the contact and freedom of running barefoot along with the protection and traction of a shoe. Some wearers also swear by them for on-your-feet work that keeps you on the move, like waiting tables. $85 for Nike colors; $110 for “build your own” color palette at www.nike.com.