Found my old bivvy bag. It has a drawstring closure which is not ideal but it is still cool.
I used this recently and it is still great after years of use. I actually upgraded to a rab one recently which is better but also 3 times the price.
I slept out in it for old times sake and it keept me dry in a constant drizzle.
My mate tried sleeping out in a bothy bag which was less than ideal but he survived and has now bought a bivvy. the big yellow bag is my rucksack, boots etc.