The BMAI Carbon 4.0 SL (Jingtan 4.0 SL) is BMAI's flagship carbon-plate marathon racing shoe, engineered for elite runners and long-distance athletes chasing personal records. Powered by a supercritical foaming midsole with 80%+ energy return and a full-length spoon-shaped carbon plate, it delivers explosive toe-off and sustained responsiveness over the full marathon distance. The ultra-lightweight SL mono-mesh upper sheds every unnecessary gram, while the high-abrasion rubber outsole ensures reliable grip on any racing surface.