The new Seamless jersey specifically for karting is made with a double polyester/polypropylene structure to ensure maximum hydrophilicity and breathability. The jersey is made using a "body-size" knitting process, where the garment is produced in a single piece, eliminating side seams. This type of manufacturing allows for the creation of different areas, with varying degrees of stretch, depending on the needs. The raglan sleeves provide a more comfortable fit thanks to the positioning of the seams on the sleeves in areas less subject to pressure and crushing. The cuffs and bottom of the jersey are finished with a thin finish for greater comfort. The Seamless long-sleeved kart jersey is not FIA approved.