The Head Superflex junior goggles have a soft TPR construction, designed to provide junior swimmers with optimum comfort. The hydrodynamic, curved polycarbonate lenses are unbreakable & made to perfectly adhere to smaller faces; they also have wider peripheral vision. Their buckle has the Rapid Adjustment System (RAS), which results in precise & intuitive adjustment of the head strap. It is placed on the eyewear to avoid excessive tension & lens deformation. The lenses have anti-fog properties & provide UV protection.