The Tifosi RX adaptor is an adjustable performance nose piece and optical lens carrier which integrates seamlessly to fit the data-bss-pl="active" title="Alliant Sport Sunglasses" href=" data-bss-pl="active" title="Podium XC Sport Sunglasses" href=" XC, data-bss-pl="active" title="Rail Cycling Glasses" href=" Rail Race or Rail XC), data-bss-pl="active" title="Sledge Lite Sport Sunglasses" href=" Liteor data-bss-pl="active" title="Slice Sport Sunglasses" href=" The adaptor easily snaps into place replacing the existing nose piece to provide the corrective vision required while keeping the large field of view and lens interchangeability. RX ADAPTOR