NEW YORK (TheStreet) -- Wearing unprofessional or overly revealing attire to work during the summer can ruin your professional brand. No matter how hot it gets, donning cooler clothes isn't worth jeopardizing your career. Our experts weigh in with seven of the biggest summer office wardrobe mistakes:
1. Wearing your sweats before you leave for vacation or the gym
If you're putting in a half-day or leaving for the beach after lunch, don't wear casual clothing to the office in anticipation of your next stop. Your boss and clients don't know what your plans are -- they just know you look unprofessional.
"Just go the extra mile and bring a change of clothes," says Brittney Levine, style and trend expert. "It doesn't make sense to spend a few hours at the office not polished, not looking your best, just because you have another engagement later in the day."
The same goes for people who are running to and from the gym, Levine says. Spending an hour or two at the office in your gym clothes is never something you want to do.
"Plan ahead and bring a change of clothes. Don't wear your sneakers all day, don't wear your flip-flops all day. The office is the office, not a gym."
2. Wearing graphic T-shirts that make too much of a statement
"You want to be in style, but you don't want to be sitting in the conference room wearing a T-shirt that says, 'Don't worry, Beyonce,'" Levine says.
Graphic T-shirts may be a bigger hazard for men, as many sports shirts and concert T-shirts men wear are far too loud, controversial or "aggressive" for the office, she says. Unfortunately, they just make you come across like you're "trying too hard" to be fun-loving or funny.
"Please do not show up in a shirt that talks about drinking or aggressively beating another sports team," she says. "Even if it's casual Friday, you can't show up to work in a shirt with foul language or anything that would make your colleagues do a double-take."
With that said, if your office encourages team spirit on a particular day, don't be afraid to show your colors, says Stephanie Menchaca, manager of HR services for Insperity.
"Clothing with slogans, messages or sports logos is generally frowned upon, but one exception is a day specifically designed for employees to show their spirit for a certain sports team or cause," she says.
3. Wearing weekend clothing to the office
So many professionals look at their summer wardrobe and think, "I could get away with wearing this on a Thursday or Friday," Levine says.
"But Thursday and Friday are still workdays. They aren't the weekend, and you could have important meetings those days as easily as you could on a Monday or Tuesday," she says.
Even if your office has a casual-dress code, you must accept that you are going to need two wardrobes if you work in a professional environment -- work and weekend, Roccia explains.
"If you're limited from a budget perspective, be sure you pair your appropriate weekend garments with more tailored or professional pieces like a blouse or season-appropriate blazer," she says.