Wearing jackets keep you warm i would think you would wear a jacket?
Its deffinitly not jacket the real answer is sweet
so that he or she can keep their body warm...
heat keep us warm :)
hell yes
To keep us alive and keep us warm
A jacket is a good insulator because it traps air close to the body, creating a layer of insulation that helps retain body heat. Additionally, jackets are often made from materials like down, wool, or synthetic fibers that are designed to limit heat loss and keep the body warm. The outer layer of a jacket also helps to block wind and moisture, further enhancing its insulating properties.
A jacket itself does not have thermal energy, but it can help trap your body heat and keep you warm by insulating you from the cold outside environment.
I needed a fleece jacket to keep warm so I collected some wool from my sheep.
There's no "should" reason. Buy a jacket if you want one. They can keep you warm and can make an outfit look nicer, but you don't have to have one if you don't want one.
You would like to keep warm.
It is a dual purpose jacket and can not only supply clean power supply to charge phone battery but the advanced polymers from which the jackets are made will also keep you warm and protect you from elements because it is water resistant.