Minimalist Barefoot Style Design - achieve your physical fitness by simulating the true barefoot feeling. For barefoot style shoes new user, please took time to get use to this healthy feeling gradually. Wide Toe Box Safety Design - upgrade toe shoes design, without the separate slots for your toes. Set free your toes as real \"barefoot style (a natural stride)\" to invoid hurting toes when use. The tongue-less design - foot fits through a collar-like opening to slide into the shoe. Tighten shoes lace (army green shoes come with unique elastic lacing system) to enjoy lightweight \"second skin\" feeling. Removable Exclusive Arch Support Insole (Zero Drop Style) - gives you enough support to help you strength and exercise your own muscles and bones (provide less support than common running shoes). Indoor Activities - gym deadlifts, squats, lifting, treadmill jogging, yoga, spinning bike, rope skipping aerobics, fit ball, hot ball, abdomen back stretch, and working out in general Outdoor Activities - camping, casual walking, training, running, jogging, biking, hiking, climbing, camping, and vacation etc.