Fashion used to be much simpler for many men.

Throughout much of the 20th century, men in white-collar jobs would typically throw on a suit in the morning and be done with it.

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Yet since the 1990s, workplace dress norms have become more casual for both men and women.

However, even though suits may no longer be required in a large number of industries, many professional men still want to look polished.

Stylists such as Victoria Hitchcock are there to help them strike the perfect balance.

She specifically focuses on helping technology workers cultivate a look that is both effortless and put-together, to help them tackle Silicon Valley in style.

Hitchcock charges clients a US$2,000 upfront fee.

“I want my clients to express their own authenticity and brand, and live their lives,” Hitchcock told Business Insider.

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However, Hitchcock does have two strict fashion rules: men should avoid wearing khaki trousers and flip-flops at all costs.

When it comes to khakis, Hitchcock said that even residents on America’s East Coast should steer clear of this particular type of trousers.

I want my clients to express their own authenticity and brand, and live their lives
Victoria Hitchcock, fashion stylist

“There are other colour options, like dark olive green,” she said.

As for flip-flops, Hitchcock said this kind of footwear does not have a place in more casual settings either.

“I don’t care if they are rubber or leather, and I don’t care if you are ‘just wearing them to your friend’s barbecue on the weekends’,” she said.

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This article originally appeared on  Business Insider .