KLIM Aggressor Cool -1.0 Adult Snocross Snowmobile Neck Sock Multiple configurations: fold and double up for more warmth, pull up over neck, mouth and nose for wind/dirt resistance Easily packable into smaller pant or jacket pocket Coolcore patented chemical-free cooling, moisture-wicking, moisture transportation and cool evaporation fabric Keep cool, good dust cover/filter Can also be used as small cool wet towel on trail rides, just dip in creek