The original Waldies^® are BACK, now redesigned for optimum comfort and performance. We've reformulated our core material to be even lighter and softer while still maintaining resilient strength for wear-n-tear resistance. The AT model includes a heel strap, so you can wear these around town or on the most rugged portage trail. OR both! Get a pair of the Appalachian Trail (AT) model, and forget about all of your other shoes!