Nike Boy's Therma Training Hoodie 100% Polyester 100% polyester PLEASE NOTE: SIZE RUN SMALLER !!!!MEASUREMENTS FOR SIZE LARGE 12/14 : length 20", sleeve 18". chest 16". SIZE MEDIUM 10 : length 18", sleeve 16" .chest 14". SIZE SMALL 8 : length 16", sleeve 14". chest 12". Dri-FIT 100% polyester Imported .Featuring Therma-FIT fabric for insulation and warmth, this boys' Nike hoodie is sure to be a cold-weather favorite. Product Features Swoosh embroidery 1-pocket Long sleeves Fabric & Care Polyester Machine wash Imported.