The Nike Free Trainer 3.0 is a full-size shoe with a sock-style high-tube design. The sides of the shoe have a solid plastic body on the sides. The inside can also see the conspicuous Swoosh Logo and zipper details, and the biggest highlight is naturally The detachable Vibram outsole with straps reveals a strong sense of function. Nike and Williams have jointly developed a detachable Vibram outsole to extend this versatile sneaker. Williams said: "This shoe is designed with urban functionality in mind. We are proud to work with Vibram to create a detachable rubber outsole that will serve as an indoor sneaker and as a highly resilient urban function shoe. Nike Free Train 3 give the Men's shoes a natural feel and incorporate a quick shoelace system inspired by track spikes. A zipper on the inside of the collar makes it easier to take off and put on.