Selle Italia SLR Boost 3D Kit Superflow S3 Carbon 3D Printed ModelNumber=K0020 but it is also lightweight

but it is also lightweight and highly breathable due to the laser cut jersey insert on the back

Frame: ALUXX-Grade Aluminum

It does not work without that part

and a revamped Low Speed Rebound

Selle Italia SLR Boost 3D Kit Superflow S3 Carbon 3D Printed ModelNumber=K0020 but it is also lightweightConstructed with a proprietary 3D printed pattern for support on the toughest road rides The cover was developed using Carbon DLS technology Boost short nose improves thigh clearance, saddle fit and reduces weight Differentiated cushioning zones for progressive absorption over the entire surface SuperFlow technology for reduced pressure in the perineal area Made in Italy TECH SPECS Primary Color Black Gender Unisex Rail Material Carbon Cut Out Yes