How to best dress for the Swedish winter
Layer 1 that you wear closest to your body should be tight fitting without hindering your movement. This layer should transport moisture (that leads to cold) away from the skin. Choose a layer of wool or bamboo. Cotton retains moisture that will cool you down instead of making you warm.
Layer 2 is supposed to transport the moisture out and make sure all the heat doesn't leave your body. It's the air in the material that insulates. Choose one or multiple layers of wool or a thin insulating jacket.
Layer 3 should be wind and water resistant and protect against the cold and wet outside and keep the warmth from the other layers. It should also transport the moisture from the body out. Choose a garment with some room for the other layers and make sure that the collar protects your neck. On your feet, the outer layer should be a pair of boots. The shoes don't have to be lined, multiple socks and soles of wool will insulate the best. Choose mittens with a lining that cover your wrists och when it comes to your hat you can either choose a knitted wool hat if you will be moving around or a lined windproof hat if you plan to be still.
Layer 4 can be worn during brakes or when you make longer stops. You can either wear it over or under your third layer. It could be a warm thermal jacket or pants or something waterproof if it starts to rain.