Here, they can't do it with the kind shoes they're wearing, so they have to take their shoes off, get barefoot into the boxes, in this cold, and do that kind of work.
南極では 防寒用の靴を履いていると踏めません だから 酷寒の中　靴を脱いで 裸足で箱に押し込むという 作業を行います