For the general lines suffering from the harsh winter cold...

This is what we recommend you this time...

...which you stick on a piece of cardboard...

...and stick that under your clothes.

If you just stick that on your clothes, no other places will be warm except that area.

But by sticking it on a piece of cardboard, moving that around will be a cinch.

And you can easily place it on places without pockets, like waist and back.

#1196 Yukarin Goes To Comiket #1 C85 Edition