The neck and the shoulders are the parts where the body loses most of the body temperature. It explains the habit (and desire) of many people to wear a scarf in winter.
In 2006 I injured my neck in an accident and ever since the lower part of my neck has been a point of weakness. After this accident I long, even more, for protected, warm and covered shoulders. It is good to give the neck and shoulders a bit of extra attention in winter.
This ‘hot drop’ filled with cherry-stones can be heated up by putting it on top of the heater, in the oven or microwave. You can wear it underneath your cloths and it will give you warmth for 45 minutes. The front can be worn as a accessory, like a piece of jewellery for example, because it is not necessary to hide all that you wear.