As people frequently step all over the earth, shoes can only hope to avoid our planet's inevitable wrath by becoming sustainable or requisitioning hoverboards. Give feet a chance with today's Groupon: for $20, you get $50 worth of shoes and more at Birkenstock of San Diego. Choose from five locations: Coronado, Lemon Grove, San Diego, Encinitas, or Palm Springs.
Although it started out slinging only Birkenstock sandals, Birkenstock of San Diego now fits shoppers with shoes by more than 30 style-, environment-, and comfort-conscious manufacturers. Birkenstock's Gizeh Birko-Flor sandal ($74.95) provides pronounced arch support and more to double as leisurely foot dens, and it comes in seven synthetic varieties. Vibram FiveFingers ($74.95–$124.95 for adults; $59.95 for kids) nestle each little piggy into its own home, spreading the foot naturally and reducing stress on the knees, hips, and lower back. The quest for 100% sustainable shoes is led by Simple, whose men's D-Solve sneakers ($64.95) rock organic cotton lining, footbeds, and laces, and include biodegradable soles and water-based glue to hold the shoe together.