The houndstooth jacket
This is one of my favourite jackets, mainly because of the colours and the houndstooth pattern (which I am very fond of)., but also because it is a great “three season” jacket. It is light enough to wear comfortably on days when the temperatures might reach 15 C (like today) but still substantial enough to wear right through winter (with an overcoat of course). One of my greatest thrifting finds, made by now defunct London tailors Fallan & Harvey. It is starting to show a little wear and tear, but that is really the charm of jackets like this one.
The odd jacket and trousers
The odd jacket and trousers is at a comparable level of formality as the casual suit, at least as long as the jacket does not have exceedingly crazy patterns and/or colours. While some would argue that a suit is always more formal than odd jackets, there are very few instances today where it would be OK to wear a casual suit but where an odd jacket would not be considered appropriate. So casual suits and odd jackets are almost interchangeable at this point of the formality spectrum.
The utility of the casual suit
There is an interesting discussion going on over on StyleForum on the utility of the casual suit versus odd jackets and trousers. Since my workplace has no real dress code (university departments in the natural sciences usually are ultra-casual), I tend to use both combinations depending on my mood and what I feel wearing that day. Today I settled on what can only be described as a casual suit. While a PoW patterned suit does not necessarily have to be considered casual, the fact that it is made up in brown flannel definitely settles the issue though - not something you would ever wear in a CBD environment - but it works very well in more casual surroundings.
Another take on the light jacket/dark(-ish) trousers
WIWT Aug 20, 2013