POLARTEC Thermal Pro Honeycomb creates air pockets trapping and retaining body heat POLARTEC Classic Micro side panels forearms and neck Flatlocked sewn seams throughout for extra durability Concealed zipped chest security pocket for handy essentials whilst on the move 12 length reversed and baffled two way YKK front zip for venting and access to internal pockets whilst on the move Lycra bound hem and cuffs