The Primus Asana II lace-up sneakers from Vivobarefoot have a simple minimalist lightweight construction to give you freedom and allow your feet to move as naturally as possible. Premium durable nubuck leather and texile upper. Soft leather and textile lining for added comfort. Removable, recycled PU insole for cushioning and comfort. Adjustable lace up closure provides secure fit. Durable rubber sole for maximum sensory feedback and minimum interference.