It doesn't look like much, but this simple addition takes away that heavy feeling on your neck when wearing the apron for long periods. It actually works incredibly well. We use them in our warehouse when wearing the aprons all day and having tools in the pockets.
Note: The newer version of the apron (March 2021 onwards) has one of these included in each pack. We figured there would be customers who had purchased the earlier design and would like to get the neck saving strap rather than having to buy a whole new apron.