It's cold outside, but when you go in the venue hall...

...the heating pads will warm up.

At that point, you can get low-temperature burns, so throw them away.

There's no need to remove clothing when you take off the heating pads, so you won't damage the fabric.

By the way, separation of trash in Tokyo varies from ward to ward...

...but in Kōtō, where the International Exhibition Center is located, heating pads are non-burnable trash.

Cardboard is a recyclable paper stock.

If you're puzzled, ask one of the staff members collecting trash.

#1197 Yukarin Goes To Comiket #2 C85 Edition