I wore one of these for many whole days out in the middle of farm fields in my detecting days. Good at both keeping the rain off and the sun.
Boonie bush hats. The UK military style hasnt got as wide a brim as the US type. I prefer the US type both functionally and aesthetically. The string loop can go over the top to hold the sides up for full safari look.😁
You can go full “Lone Survivor.”
https://www.ebay.co.uk/itm/270584593754
They are cheap but surprisingly rugged, mine lasted for years. This is the same ebayer I bought it from. Strangely, in metal detecting circles, the desert camo colouring was and is in vogue… Together with the matching army surplus jacket and trousers.
Must have been an odd sight for passers by to see about 60 guys on a farm field all wearing desert camo gear… in a farm field in the middle of winter…