Cotton/linen , linen, mainly in spring and summer.
Fall/winter , pincord, flannel and some donegal wool.
Basically, nothing that looks like it is part of a suit.
I probably don't need any more shoes.
A lot of loafers - mid brown suede is a staple, have them in navy suede, tan and darker brown calf.
Other footwear returns to the rotation in the fall.
Collar and maybe one button unbuttoned. No french cuffs.