Thomas EMS TTR152s is the ALS Ultra Roller, Blue (shell only, no pouches).
It belongs to the ALS Ultra Roller family — wheeled advanced life support packs that include a lightweight internal frame, inset high-impact wheels, and a telescoping handle for easier transport of EMS gear (though the “s” version omits internal removable pouches).
The ALS Ultra Roller series is designed for EMS professionals to organize and move advanced life support supplies (equipment not included).
As listed in the catalog, the TTR152s is specifically the shell only version without the internal pouches and accessories that come with the fully equipped TTR152.