Seirus Innovation Adult Dynamax Cold Weather Combo Masque for Face Protection Micro Denier Thermax Imported Seirus' exclusive Dynamax - dual density, micro denier Thermax Dynamax has more stretch, more warmth, more wicking and wind Block but still thin Seamless bandana with built-in Contoured weathershield facemask Full face and neck protection Thin, warm, wicking, wind-blocking, stretchy