This was just what I needed for a very cold, very snowy winter in the mid-atlantic region.  It's thick, but not too thick that you can't breathe through it. It is very warm and effective at blocking out wind/snow. It is easily adjustable so that you can place the mouth opening above your nose, below your nose, or below your mouth.  I couldn't be happier with the purchase. One size does seem to fit all as well.