One kind reader asked about what characterizes a “professional grade blouse,” and that’s a great starting point to today’s post – what to wear when the mercury rises, the humidity is like humus, and you’ve got to take Metro to the job interview or important client meeting.

Under your suit, you’ll want something that will make you look crisp and pulled together, while at the same time, keep you cool. This is where a sleeveless blouse with a no-iron finish comes to the rescue. A cotton or cotton-blend button front blouse shouldn’t pull at the bust line, and those with ample curves will want a blouse with darts or seaming to allow for shaping.

Another option is to select a shell made out of silk or a silk blend. To stretch your budget, buy a twin set and wear the shell under your suit, and wear the set with a pair of trousers or a skirt later in the week. I don’t like 100% cotton knits as a rule, because they can look too casual, and after a few washings tend to look worn and lose their edge.

When selecting your suit, think fabric, fit and fun, in that order. For a meeting in late June, July or August in the District, try tropical-weight wool suiting. Just the word “wool” may make a few of you out there cringe, but tropical weights are lighter than you think, breathe beautifully, and the wrinkle factor is low. Another alternative is cotton mixed with a bit of Lycra and perhaps a dash of linen.

Once you’ve decided on the fabric, be sure your suit fits you well. I’ve seen one too many ladies wearing jackets this summer with the sleeves rolled back, exposing the sleeve’s lining. Spend the $15 to have the sleeves shortened – it will make a huge difference and you won’t look like you’re wearing someone else’s jacket.

Now comes the fun part.  Because it’s summer, many Washingtonians wear seersucker, the quintessential summertime fabric. I love seersucker and find it quite appropriate for just about any summer meeting. Blue and white is the classic, but it also comes in brown, pink and beige stripes. If seersucker isn’t your glass of iced tea, consider pairing that more conservative wool or cotton-blend suit with a brightly colored top and shoes with either an open back or open toe, but not both. It’s still the capital, after all.

This small cobalt multi color tote adds a perfect touch to your look.

Next time, we’ll discuss why wearing pantyhose in July still makes sense for those of us inside the Beltway.