This was my first Fox 360 jersey (coming from a 180), and I'm really impressed by the breathability. Honestly, it doesn't even feel like there's a jersey on your back. The whole back of the jersey, the under side of the sleeves, and the underarm sections of the jersey are all super breathable mesh. There's also perforation holes by the shoulders that work well. The jersey itself is really cool- the military theme looks great especially with the "Dream On" patch and the vintage-y fox logo on the arms. Overall very happy with the jersey.