The aerodynamic piston provides ultimate comfort and flair with exceptional functionality.Ventilation slits on the top, bottom, and sides of the frame prevent lens fogging.The shatter resistant polycarbonate lenses are optically correct to eliminate distortion.The adjustable strap and flexible frame material create a versatile fit while open cell foam cushions the face and absorbs sweat.Included with the goggle is a microfiber pouch that also functions as a cleaning cloth.