Brushed on the inside for cozy, 4-way stretch for movement, and moisture wicking for thermoregulation this is a nice 150 gsm weight fabric for high energy fun in the cold. Panel construction for movement is done with flatlock no-chafe seaming with color blocking for a slimming styling. A soft feel, a robust technical performance, and a turtleneck you can pull up or fold down this is a great synthetic layering piece with the unusual touch of a traditional turtleneck in a technical baselayer piece.