Purchased during Winter, so I cannot comment yet on any 'anti-sun properties'. Used this as a base layer (ECWCS L1 for those in that ecosystem) and it has performed well during extended high-output cold weather activity. I anticipate the same for Summer and intend to purchase a few more.
My go to layer for cold active days. I’d recommend these to anyone. Sizing was as expected.
This is hands-down the most breathable shirt to wear under a vest, and still feels good 10 hours into my shift.
