Traditional Rain Clothing

[Lallans]

Thanks to their somewhat-annoying website, I can't tell if Barbour stil makes my recommendation, but in addition to the jackets already mentioned you could look for a very long equestrian waxed cotton model they at least used to sell, "the Mark Phillips" or its replacement (got mine at least 20 years ago). Worn off a horse, it comes off as a sort of floppy trench coat and works very well when kilted. But for rainy warmish weather, of which we Eastern Canucks had a plethora two years back, I had to invest in a 'Band Spec' model nylon Inverness cape- there's warm and then there's Barbour warm.

The 'band spec' has the silent endorsement of every pipe band I've ever seen in the rain....