Or you could just wear a sweater like a normal person
Have you ever had a hankering for an official Mr. Saturn belly warmer? I have. It's called "buying a T-shirt with Mr. Saturn on it." The cool thing about that is your shirt doubles as a torso warmer as well. If you buy a long-sleeved shirt, the sleeves work as arm warmers. It's a pretty neat concept.
I guess you could also pick up these strange knit items that these women and men are wearing on their stomachs. Supposedly they're good at regulating body temperature, but I think they'r really good at making you look uncomfortable and as though you're wearing some kind of brace or bandage. In any case, this new line features Mr. Saturn (of EarthBound fame) across three different designs for men and women. They're releasing exclusively in Japan for about $38 apiece, but I can't really understand why you'd wear one of these.
On a side note, what's going on with the faces these models are making? They're horrible. They definitely don't sell me on the product at all, either: "Hey, excuse me, miss, can you look completely and utterly confused as to why you're wearing this product, please?"