Well, it sorta depends....

When its cold outside, its a fleece/wool neck gaiter.

When its hot, its a thin mesh facemask.

When its cool in the morning and hot during the day, its merino wool socks.

And whenver there are mosquito's...the Thermacell (which really doesn't count as clothes) is a MUST! It does allow you to lose the bug suit (which is often a sweat box) and go with lite weight stuff instead though!