On the behalf of the Duchess of Cambridge, we've got to say thank goodness for athleisure. Without stylish pieces meant to work out, how else could Kate Middleton ever attend sporting events where she's required to get active without losing a modicum of royal dignity? For a tennis event in Scotland this winter the brand she relied on was Monreal, a London-based company created by tennis player Stefanï Grosse.
"She's such a style icon that it was extremely flattering to see her sporting our tuxedo track pants. We were caught by surprise and didn't know she was going to wear them," Grosse told us, having found out later that Kate bought the pair herself from a London shop. Pay attention to the shape too: they're looser than leggings (could a new trend be bubbling up?) "I wouldn't be surprised if her choice of leg shape has an impact on the next athleisure silhouette. The slim-fit track pants are perfectly suitable for any type of workout and less revealing than classic leggings, making them a more polished and sophisticated look for wearing outside the gym."
While we're eager to see how the Duchess-approved pants affect what others reach for, classic leggings are unlikely to flag in popularity any time soon. According to Grosse, the key to making yours work outside the gym is to carefully consider both shoe and color.
"Chic sandals will make stylish leggings perfect for any occasion—they can even be worn well with heels," she said before suggesting you leave printed tights to the workout arena. "Darker, muted colors are generally the easiest to wear in non-sports related environments." To really rock the leggings IRL game, it might be worth it to consider shopping separate pairs for your cardio and your off-time. Grosse mentions a pair of biker leggings with zipper details that "can be worn just like skinny jeans. Combined with a beautiful long cashmere sweater or cardigan and smart sandals or boots, leggings are definitely office worthy."
As much as we love 'em, there's more to athleisure than just leggings. If you've already figured out how to wear yours 24/7, consider adding in a new shape and follow Victoria Beckham's lead.
"She was one of the very first customers to purchase our signature tennis dress at Harrods. It's the perfect athleisure style, and I don't believe she's a tennis player," she commented. "A lot of women wear it as a white summer dress. Some of our tennis skirts have been spotted around town combined with designer tops or knitwear."
Investing in pricey workout togs can feel a little bit jarring, but finding a great fit and superior fabrication (and an overall product that won't disintegrate after too many dances with the dryer) can be worth it. Take heart too that the athleisure trend isn't going anywhere. Grosse started Monreal in May 2012 to fill a void she'd noticed and has seen that there's major staying power.
"I simply wasn't able to find high-performance workout gear that would also be stylish enough to zip around in when the match was over," she explained regarding her push to start designing. "Athleisure has taken off rapidly since, and this trend is here for the long run. Activewear is no longer just about practicality and need—it's about desire."
See photos of Kate Middleton's great street style in the gallery below:
Kate Middleton's 33rd Year in Pictures
How to wear leggings at work, according to a woman who's dressed Kate Middleton in workout clothes
Less than 4 months before her daughter was due, Kate was still making apperances! She looked bright and happy in a periwinkle coat at the Emma Bridgewater pottery factory in February. (Photo by Max Mumby/Indigo/Getty Images)
Tickled pink! The Duchess' baby belly was really starting to show by the end of March and she was all smiled as she and Prince William headed to the XLP Mobile recording Studio on March 27. (Photo by Chris Jackson - WPA Pool/Getty Images)
Water for the Duchess! Prince William imbibed in a bew on St. Patrick's Day at the parade at Mons Barracks, while pregnant Catherine enjoyed a glass of water. The two soon-to-be parents couldn't stop smiling (Photo by Eddie Mulholland - WPA Pool/Getty Images)
Three's a crowd! Prince Harry, Catherine, Duchess of Cambridge and Prince William got gussied up to attend a Service of Commemoration for troops who were stationed in Afghanistan and as usual the trio looked happy to hang out together. (Photo by Samir Hussein/WireImage)
Kate looked right at home working with a student during a school visit two months before her second child was due! How much do you love that dalmatian-like dress?
(Photo credit should read SUZANNE PLUNKETT/AFP/Getty Images)
Pretty in pink! Kate looked lovelier than ever as she and her husband attended the Observance for Commonwealth Day Service At Westminster Abbey. How fabulous do her growing baby belly look? (Photo by Chris Jackson/Getty Images)
Welcome to the world, Princess Charlotte! The proud parents showed off their brand new bundle of joy on the steps of the Lindo Wing of St. Mary's Hospital on May 2, 2015. Kate was absolutely glowing in a yellow dress while little Charlotte was swaddled in a gorgeous white blanket. (Photo credit: Paul Treadway / Barcroft Media via Getty Images)
While Kate and Charlotte were the stars of May 2, Prince William and Prince George were quite the men of the hour as they waved to the crowds of well-wishers at St. Mary's Hospital. Prince George was reportedly very excited about meeting his new baby sister.
Photo by Anwar Hussein/WireImage)
One month after Princess Charlotte's arrival, the royal family was back in action attending royal events. First stop was viewing the fly-past during the Queen's Birthday Parade, 'Trooping the Colour -- and Prince George nearly stole the show with his cuteness. He was clearly excited to see the airplanes.
Photo credit should read BEN STANSALL/AFP/Getty Images)
Mommy duty! Prince George turned into quite the precocious toddler over the year and Kate clearly has her hands full with him. The happy royal took her cutie to watch a charity polo match and enjoy a little mommy-son time. (Photo by Max Mumby/Indigo/Getty Images)
All smiles at her royal duties! Kate looked cozy and coastal in a striped shirt and pullover during a visit to The America's Cup World Series on July 26, 2015 in Portsmouth, England. (Photo by Samir Hussein/WireImage)
Having two tots under one roof likely was a big change for the royal couple, but they looked happier than ever during a date to Wimbledon in July. We can't get enough of how happy they always look together.
(Photo by Karwai Tang/WireImage)
The faces say it all! Harry, Kate and Will couldn't contain their emotion during the England v Wales match during the Rugby World Cup 2015 on September 26, 2015 at Twickenham Stadium. The trio always seem like they have a blast together. (Photo by Karwai Tang/WireImage)
Haircut! Kate showed off her brand new bangs in early September and set many royal watchers running to the hair salon to replicate the bouncy and modern look. (Photo by Max Mumby/Indigo/Getty Images)
Fashion forward Kate didn't miss a step at the 100 Women In Hedge Funds Gala Dinner in an Erdem floral gown. You'd never guess the gorgeous royal gave birth only six months prior based on this look. (Photo by Mark Cuthbert/UK Press via Getty Images)
Date night! Kate and Will showed off their glam side to attend the premiere of the latest Bond flick "Spectre." As usual, Kate dressed to impress in a powder blue gown from Jenny Packham.
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Always up for adventure, Kate didn't skip a beat when she was asked to rappel down a mountainside at an outdoor education center. (Photo by Chris Jackson-WPA Pool/Getty Images)
In November, the world was rocked by terrorist attacks at Paris, and Kate took time away from her schedule to sign a book of condolences for the victims of the attack. (Photo by Jonathan Brady - WPA Pool / Getty Images)
The same week, she and William attended the Annual Festival of Remembrance on November 7, 2015. Kate looked respectful in a black, lace dress with a red poppy. (Photo by Chris Jackson - WPA Pool/Getty Images)
Catherine scored major style points when she attended the Diplomatic Reception at Buckingham Palace on December 8, 2015, wearing one of Princess Diana's favorite tiaras. The subtle nod to her would-have-been mother-in-law has continued to make Middleton one of the most beloved royals in recent history. We have to admit, we're big fans of Kate too. (Photo by Mark Cuthbert/UK Press via Getty Images)
Life of the party! Kate kept a sweet beat on the drums as the Anna Freud Centre Family School Christmas Party and couldn't help but smile and clap along. Photo credit should read CHRIS JACKSON/AFP/Getty Images)
Another haircut switcheroo! Just in time for the holidays, Kate chopped off her signature long locks in favor of a below-the-shoulder 'do. Many royal-watchers joked that stole the cut from her mom, Carole, who also has impeccable taste. (Photo by Mark Cuthbert/UK Press via Getty Images)
The royals celebrated Christmas with their annual tradition of attending a Christmas Day church service at Sandringham. Kate looked festive in a pine green coat and color-coordinated dress and hat. (Chris Jackson via Getty Images)
Kensington Palace released a series of sweet snaps of the family of four just in time to end the year. The Duke and Duchess of Cambridge with their two children, Prince George and Princess Charlotte, looked happier than ever together. (Photo via Chris Jelf/PA Wire)
Princess Charlotte was by far one of the biggest highlights of Kate's 33rd year. Her daughter looks almost exactly like her with her fair skin an dark hair. (Photo by HRH The Duchess of Cambridge via Getty Images)
A handout photo released by the Duke and Duchess of Cambridge of Prince George and Princess Charlotte. The photograph was taken by the Duchess in mid-May at Anmer Hall in Norfolk, the couple's home. It perfectly sums up Kate's year in photos. (Photo via Duchess of Cambridge/PA Archive)
To cap off her record year, Kate snapped this adorable photo of her son, Prince George, headed off to his first day of school. The little prince is attending Westacre Montessori nursery school near Sandringham in Norfolk and it's clear that Kate is one proud mom. (Photo via Duchess of Cambridge/PA Wire)