Summary:
- The science behind how winter jackets keep you warm involves the materials and design used in the jacket. Jackets with insulation, like down or synthetic fibers, trap heat from your body and prevent it from escaping, keeping you warm.
- The structure of the insulation materials, with many small air pockets, helps trap heat and prevent it from being conducted away from the body. This is known as the "loft" of the insulation.
- The outer shell of the jacket is also important, as it blocks wind and water from penetrating the insulation and reducing its effectiveness. This helps maintain the warmth trapped by the insulation.