What's up with the mesh on MLB's spring training hats?

New Era Cap Ushers in the 2022 MLB Season with New Spring Training

MLB Spring Training caps unveiled

New Era 2023 MLB Spring Training hats available now

MLB Spring Training 2016 New Hats & Cool Base Jerseys

The Detroit Tigers 2023 Spring Training 59FIFTY Fitted Cap features an embroidered Tigers logo at the front panels with a matching MLB Batterman logo at the rear. Additional details include a Spring Training League patch at the right-wear side and a gray undervisor.

New Era Detroit Tigers Navy Blue 2023 Spring Training 59FIFTY Fitted Hat, Navy Blue, POLYESTER, Size 7 1/8, Rally House

New York Mets '47 Women's MLB Spring Training Confetti Clean Up

Batting practice caps take starring role in spring training

Vintage Arizona Diamondbacks New Era 59FIFTY Mesh Spring Training Hat MLB 7

A leak of the Astros Spring Training Hat : r/Astros

2023 MLB Spring Training Hats — UNISWAG