It's over to you and your feet with the fun and fastUltra: letting you experience and enjoy your environment as naturethe intended. With a removeable inner sock you decide how to wearthe Ultra， depending on the terrain and conditions or what moodyou're in! The Ultra pushes the boundaries of footwear functionwith its unparalleled concept. The innovative and efficient design:a dual-injection construction gives durability， comfort， andflexibility where it's needed. It's a lightweight， ultra-thin，flexible and completely amphibious shoe that is also brilliantlyrobust， great looking， and Ultra barefoot.

Removing everything that hinders your natural footfunction; the Ultra stays true to our principles by featuring ourPure Barefoot Technology that lets your feet do their thing. Letting your feet provide natural motion control comesnaturally to the Ultra， we designed it that way by using a Veganand non-toxic dual-density EVA (Ethylene Vinyl Acetate). Thisglueless， monomaterial is soft and has hexagonal perforation on theupper providing total flexibility and comfort. Whilst the sole isequally supple it is also highly abrasion resistant and durable.With the Ultra you'll have no difficulty rapidly engaging your bigtoe with the earth and also achieving independent rear andfore-foot movement.

Ultra Pure - It is recommended that you take a size smaller thanyour usual size so that the shoes will be fitting， thanks!