Why We Made this Built for heavy-duty transport and maximum versatility, the M.U.L.E. PRO X is a high-capacity roller system designed to move critical gear with ease. It seamlessly converts to a backpack when mobility matters most, while its expandable design supports up to four external modules. Inside, a thoughtfully organized layout keeps equipment secure, visible, and ready for rapid deployment in demanding environments. Who It's For Medical air transport, professional sports, sports medicine, midwives and more. Trusted By US Olympics, Event Medics, and more. Backpack/Roller bagVersatility M.U.L.E. (Multi-Use Large Equipment) enabling you to convert multiple bags into a one bag system Hideaway padded backpack straps distribute weight for maximum comfort Field tested high quality wheels, telescoping extension handle assists deploying heavy loads Includes detachable DEEP STUFF™ pocket and STICKIT STRIPS™ OPTIONS Add up to four (4) Zipper ready MERET modules Add MERET Oxygen Conversion Kit for MJD or MD O2 Cylinder storage StorageCustomizable Customizable internal main compartment with Slider system adjustability Zippered internal mesh compartments Large rear tape plate for ID customization OrganizationBuilt for work Exterior Infection Control Material allows for quick decontamination of bloodborne pathogens and other potentially transmissible substances Double stitching on all stress points Inner foam construction maintains shape and protects contents MODULES AND SUPPLIES NOT INCLUDED.