Features versatile and warm mid weight baselayer top from the north face polyester flashdry eco stretch double knit construction this technical fabric layer manages moisture odour and body temperature effectively whilst providing an unrestrictive next to skin fit flat locked seams this design combats chafing and rubbing next to skin fit half zip design with mock neck adjust to seal in body heat to expel excess warmth to prevent overheating weight approx 250g recommended activity h