well, my favorites are the type that under armour and Nike have. the portion that goes over the chin and mouth is a separate peice of fabric and it's easier to move it down to your chin. It is very thin. It is made of thin polyester wicking fabric.

http://www.underarmour.com/shop/mens...od/8000022-400

They used to have it in tan and camo green, but I don't see it now. I got mine at D*ck's

I have a Nike one too. I actually like it better although it's made exactly the same. It's just made of that Sphere dimpled fabric.