Because Gotham is always cold, regardless of the weather.

Gotham City has this innate chill; a bone-deep cold that has nothing to do with weather conditions or dropping mercury. It stems from an isolating, ominous awareness that Gotham is...

A). Alive.
B). Trying to kill you.

So, to fight both the external and internal chill we recommend the Batman Symbol Heather Gray Long-Sleeve Men's T-Shirt. 

Made from 100% cotton, this heather-gray long-sleeve Batman shirt features a sizable, bright and yellow Batman symbol.

• Long, arm-warming sleeves? Check!
• Solid, brightly colored, screen-printed symbol? Check!

Heather-gray??

This long sleeve Batman shirt features a "heather" or marbling effect created by the interweaving of lighter and darker threading.