smart long coat/raincoat

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I am starting a new job soon and have some new smart clothes but can't put my old faithful puffa jacket on top. Looking for a black long coat I can wear through spring and summer, ideally showerproo

No suggestions?

mac in green or navy
cute striped mac
Is that the type of thing you mean? I'd try TK maxx too as it's not really coat season in stores atm.

Thanks. Shape of those looks good but needs to be black really.