This latest version of the ADV Pro fiberglass seat is manufactured using Sparco's QRT (Quick Resin Tech) process. This has resulted in a considerable weight reduction without compromising rigidity or safety. QRT manufacturing process for significant weight reduction (9.3 kg only) Versatile seat suitable for race or rally use The helmet shape provides excellent head and shoulder protection Low base cushion and deep side reinforcements provide high Side support and impact protection levels The ADV QRT professional seat offers an incredible weight saving of 2.3 kg compared to the previous version (not QRT). Even with this reduction, safety or rigidity is not compromised. The ADV QRT has integral head protection and very deep lateral reinforcements with a low base cushion. This allows the legs to remain with the limits of the seat shell for better impact protection. This also provides excellent lateral support during high G curves. The non-slip fabric is used in the shoulder area to help prevent excessive body movement. One piece base and back cushion are removable for cleaning, and replacements are available separately. FIA 8855-1999 approved What is QRT? QRT (Quick Resin Technology) is a cutting-edge manufacturing process developed by Sparco to create the lightest and strongest fiberglass shell seats currently available. The QRT seating range offers a 30% weight reduction, compared to a fiberglass seat manufactured using traditional methods, without compromising safety or quality.