Re jackets layers , layers , layers . Two jackets are enough for all situations one light windbreaker , and one waterrepellent jacket . Rather than buying a thermal jacket on top of that , try adding more layers underneath thermal shirt regular tech longsleeve fleece sweater light jacket amounts to the same level of insulation as a thermal jacket plus longsleeve . It ' s also cheaper , because light jackets cost significantly less than thermal jackets , and fleece can be had super cheap . For the pants legs can put up with a lot , and they ' ll be working , so it has to be reeeeeeally cold before you need to start layering at all . When you do , I ' d prefer extrawarm tights plus lighter sweatpants over regular tights with warm sweatpants . There ' s tights with a fleece lining inside , those are gorgeous and will be plenty down to at least 10 C .