I got this T-shirt at the 2023 JP Morgan Corporate Challenge 5k race.
I really like the fabric and would like to buy more shirts like it but I haven't been able to find an exact match.
I understand that it's a performance type T-shirt but this is a special quality that's not normal to generic performance polyester, and thus haven't been able to find it.
Here are two photos. On the outside is a very light perforation kind of jersey knit, but it's more smooth on the inside.