Designed to reinvent the way you exercise: technology that delivers maximum freedom of movement, with much more safety and comfort.Fiber workout shoes provide extra protection and comfort so you can get the most out of barefoot workout: higher level of stability and balance; range of movement; strengthening of the feet’s muscles and larger proprioception. Much better than tennis shoes.The Fiber workout shoes are made of sustainable knit – produced from recycled PET bottles, which is a high-performance material.