The jacket shown here is a size 54 which, according to the Dainese size charts, should fit a 42.5 inch chest. I consider it the equivalent of a U.S. men’s size large and it should fit a 43-44 inch ...

In any case, the “new” Dainese sizing standards are right on the mark, based on our experience with both the Dainese D-System D-Dry 3/4-length jacket (review) and the previously mentioned Shotgun ...

The vest is also foldable for storage in a backpack, top box, or bag. The Dainese Smart Jacket vest will retail for $699 in women’s and men’s versions in six sizes each in July.