The New ADV-XT Seat from Sparco compliant with the more stringent 8855-2021 approval. The seat benefits from shock absorbing foam on the head & integrated racing net guides 

FIA 8855-2021 Approved

• Integrated racing net guides
• Shock absorbing foam on the head 
• More stringent 8855-2021 approval

The seat is approved in combination with the 0049305 side mounting brackets, which can be found here