The perfect BNQ & CE certified all in one base layer with built-in neck guard protection. Easy close adjustable collar for customized fit and comfort. DuPont KEVLAR fibres used for cut resistant protection SR Sizing: Small - Chest 37" - 38" / Neck 13.5"-15.5" Medium - Chest 39"-40" / Neck 15"-17" Large - Chest 41"-43" / Neck 15"-17" XL - Chest 44"-46" / Neck 18.5" - 19" XXL - Chest 47"-49" / Neck 18.5"19"