My neck is never the first or the most noticeably cold part of my body. It’s always my feet. Though, this seems like a plausible product since the neck can definitely be a gateway to chilling the rest of your body if not protected.
Newly announced from Sanyo is their rechargeable neck warmers. The press release is in Japanese so I’m not even gonna link to it. No word yet on specs, availability, or pricing, but this should be of interest to any one who enjoys or works in the cold outdoors as anything heated will radiate through your whole body. Sort of like a flask of whiskey.