Bringing Formula 1-derived features, along with specific innovations for the kart track, the new Tech-1 KX V2 is now lighter and more breathable with a revised asymmetric lacing system to conform more closely to the foot. The use of thin PU film adds durability whilst reducing seam construction and pressure points. Laser cut-outs and perforations in the film, combined with 3D mesh, offer maximum breathability. Youth Tech-1 KX V2 Shoes