Tog24 siren mens 375 fleece jacket part of the all terrain range the siren is a high performance mens fleece jacket manufactured in market leading 375 fabric for exceptional breathability and warmth the siren is also wind resistant and packed with technical details such as shaped side seam panels inner storm flap adjustable hem and bound cuff and zipped chest pocket an ideal mid layer or stand alone style the siren is perfect for a wide range of activities from walking to hiking wa