This thing is thin, light, and perfect for cycling.  I use it for mountain biking in early winter, and it keeps my head/face warm while fitting under my helmet comfortably.  The neck of it is long enough to tuck into my shirt, and doesn't feel bulky or pull out easily when I turn my head.  I've gone through several like this, but none of them stayed on my face as well as this one!  You can keep it under your chin, over your nose, over your lips and under your nose... any way you want without constantly making adjustments or sliding down.  I got this one almost a year ago, and feel I overpaid (almost double what it sells for now).  However, for the current lower price you cannot go wrong!