Sierra Auto Tops Audi 2000-2008 TT Roadster Convertible Top, TwillFast RPC Canvas, Black First quality Haartz Twillfast RPC cloth with a dobby weave (criss-cross) inner lining This material provides up to 2dB (noticeable) noise reduction over standard topping materials Factory-style headliner attachment installed around window with pre-punched holes Deck seams are heat-sealed from the inside as original using specialized equipment Plastic, pre-punched retainer attachments are sewn-in for an easy installation