This may be one of the greatest buys I've ever made. The possibilities are just about endless with this thing.
I've used it running and biking as a sweat band or cap, I've used one in nearly every airsoft loadout over the past six years. It's very lightweight and soft.
Just to give you an idea of the versatility-
I was working hay in 90+ degree weather, out in the middle of a huge field, throwing 50 pound bales up on trailers. I wore it over my head and got sunburned all over my arms, but not my head or neck (which were covered by the Recon Wrap)
Then, after the bales were loaded, we had to put them in the loft of a barn. It gets indescribably hot and stuffy when you're up against the roof stacking bales, with hay particles in every breath you take.
I just wore it like its pictured, as a balaclava of sorts, and used it as a gas mask.
The possibilities are endless.
Goes with any loadout you can imagine.
Soft and comfortable
Offers protection of various kinds
Literally, I can think of none.