MAP: $549.00 and for zippered model: $559.00
The new Advantage™ model is a culmination of more than a decade of experience in airbag technology by MUGEN DENKO, LTD.
This "harness type" airbag employs the new higher speed key ball mechanism (component that activates the CO2 cartridge).
About the sizing label and sizing chart
These vests are sold internationally so they include the sizes for each major market, the Japanese, European and USA market.
If you look only at the “EU US” size at the bottom of the tag and understand that the vests are adjustable over their respective range to fit a person whose height, chest size and waist size fall within the individual sizes of for example "XL" to "3XL" for the Advantage "Large" model it might make sense.
So ignore the two top sizes on the label and look only at the bottom size which is applicable to the USA market.