Thomas EMS TTR150s refers to the ALS Ultra Roller, Orange (shell only, without internal pouches).
It is part of the ALS Ultra Roller family — a wheeled advanced life support transport pack that combines robust EMS pack construction with wheels and a telescoping handle for easier transport of heavy equipment.
The “s” suffix means this version includes just the outer pack shell and does not include removable internal pouches.
Typical features of this roller pack series include a lightweight internal frame with wheels and a telescoping handle, backpack-style straps with quick-connect, and a durable exterior designed for EMS use.