Old wealth or new wealth?
if you want to look old wealth then it's old slightly moth eaten cashmere, or old well washed and faded lightweight cotton top, and cords (trousers or skirt) or comfy stretch denim tied up with bindatwine /bagtie/ bale twine, as a belt, and well worn, but regularly polished loafers or wellies....never trainers! Hair normally either tied back in a slightly careless bun or plait, with stray bits hither and thither, and looking slightly unkept, or short and still looking slightly unkempt, little if any makeup, and hands which are clean, especially under short well kept nails, but show sure signs of gardening work, and two black Labradors, with exceptionally shiny coats, walking to heel. To spot this vanishing breed go to horse, yachting, garden events or spot them skulking in the kitchen gardens of national trust properties (which their families once owned but inheritance tax meant they had to off load them). Car wise, old, but with a full service history estate car, previously Volvo, but the criteria is a large boot for aforementioned black labs, wellies, picnic hamper and vintage Scottish pure wool picnic blanket, no perfume but Roger and Gallet soap.
If you want to look new wealth, then gym bunny physique, immaculately turned out even if just nipping to the shops. Good quality, tailored clothing, comfortable but designed trainers, which doesn't look too much like a trainer, smart designer sandals, with heel (no more than 2inches). A hair style that looks low maintenance, but actually takes a fair amount of work. Well manicured hands with slightly longer nails than old wealthy counter part, as gardeners are employed. A 4x4 or E car which are no more than a few years old. Understated, but 18ct subtle jewellery, and an Apple Watch. dog wise anything with a poo in its title. Subtle perfume and subtle but expensive makeup. Likely to be found at yachting, horse or social events where drinking champagne is mandatory, won't be seen at national trust properties, because they own a similar property!