Hat Club brings back their aurora-inspired set of baseball cap designs for their new exclusive release. Here is the Hat Club Northern Lights 2023 59Fifty Fitted Hat Collection. They came up with 15 team hats for this drop, all made of 100% polyester fabric. The dome has light purple panels and an indigo button. Both the front logo and the side patch on the right panel are embroidered using heat-activated threading that changes colors under the sunlight. The bill has an indigo uppervisor and a gray undervisor. On the left panel is the New Era Flag, and at the back is the MLB Batterman. Available today, March 17 at the Hat Club webstore.