The Serious Step Up Equestrian Safety Was Waiting For
About the sizing label and sizing chart
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. As you know the Japanese are physically smaller in stature than both the Europeans and the Americans.
The manufacturer reserves the right to change models and model specifications including performance specifications without notice.
Hit Air Airbag Vest