A layer of Polymer-Dispersed Liquid Crystal (PDLC) technology within a conductive coating enables users to control whether the glass in IG Switch Frameless Glass Railing is transparent or opaque. Users can toggle between opaque white with 88% privacy to 88% visual light transmission with the touch of a button. According to the manufacturer, the glass blocks 99% of harmful UV rays in its opaque white setting. The PDLC interlayer has a 50,000-hour estimated life cycle. igrailing.com