Heathen, every mad dog one of you.
If you get wet clothes, and feet, you strip bare arse naked and jump in your bivvy bag at night! In the morn you put back on your wet gear and wear it.
You do not sit in a bivvy really,as you know, so a good water proof set and hat is good. Really in there is a cance of high winds or heavy rain, nothing beats a t3nt. But tents are not all equal. Read the abovve high winds and rain, and not sitting in a bivvy comment, and then think of sitting head bent forward, face predded into the inner, or having to lie down, and you get the idea. 8ncidentally i am working on q new bivvy, with a wired peak.