The Mobius Long Boot Hi II is an over-the-knee boot featuring a stretchy leg-hugging upper and United Nude's signature Mobius heel. The fiber-reinforced nylon heel is the strongest part of the shoe, while its open wedge shape keeps it incredibly light. The popular style returns this season with an updated toe cap shape.United Nude's launch product, the Mobius, was revealed in 2003 and has since become an icon in the world of design. The style was born from a conceptual development of the M��bius strip, a single-sided surface with no boundaries. Its distinct shape was inspired by transforming the frame of Mies van der Rohe's Barcelona Chair into a single band, uniting the upper, sole, footbed and heel into one infinite piece. Normal fit Heel height: 90mm/3.5in Stretchy PU upper Microfiber lining Satin finished heel Rubber outsole Vegan