[StonerPenguin]

Hello~ I have a brief question about an irregular kanji usage. I was reading a manga and 上着 had それ as its furigana. The sentence is 「上着で何とか防げただろ？」 referring to an accident in which broken glass fell on a guy and he was protected by a jacket. My question is, why is 「それ」 used here instead of 「うわぎ」? Does affect it the meaning?

Also, seeing as the owner of the jacket is the speaker my crappy TL is; "My jacket protected you anyway, right?"