So far on her official visit to India and Bhutan with the Duke of Cambridge, she has played cricket with Sachin Tendulkar, had a go at archery, and made more seamless outfit changes than even the speediest of MTV awards show presenters. And there was another chance for the Duchess of Cambridge to show off her cool head in a sweaty situation, too - quite literally.


As she reached the end of a trek which ended 10,000 feet up a cliff in Bhutan , she had barely a hair out of place. The appearance of Kate's uniformly impeccable mane of hair was in marked contrast to the dramatic scenes atop her head in the Solomon Islands in 2012. Then, the naturally-curly haired Duchess sported a genuine case of Monica hair (whose hair upon arrival in Barbados in the ninth series of Friends led Phoebe to ask "Are you leaving the Supremes?")


Though normally a lot more in control of the hair situation, that same year on a visit to Singapore, Kate was quizzed by then 15-year-old Ella Major who asked her just how she kept her hair from frizzing in high temperatures.


Major later told the Daily Mail: "I asked her how she kept her hair so perfect in this weather, because it’s so humid. Mine always pouffes up. She said that her hair would pouffe up soon enough."


Maybe it's simply a case of not being seen outside for too long. Regardless, if you too wish to keep your hair frizz-free for the masses this summer (got any official visits to do?), read on for tips on how to do so.


The Duchess of Cambridge in the Solomon Islands in 2012


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Invest in long-term smoothness


"A great tip to battle humid hair whilst away travelling like Kate - to avoid the dreaded holiday frizz - is to invest in a permanent blow-dry ahead of your trip," says Jordan Garrett, stylist at Hershesons. "A lot of people haven't heard of this and think it's like a relaxer or a chemical straightener, which is completely wrong. You can still keep all your natural waves but without the frizz." Hershesons Permanent Blow-dry starts from £250 and lasts for up to three months.


Pre-frizz preparation


“To keep long, thick hair smooth in a humid environment use leave-in treatment masks instead of a conditioner," says Andreas Wild, senior stylist at John Freida Salons. "They are more moisturising and don’t fully rinse it out - leave about 5-10 per cent of the mask in the ends of your hair to protect it from frizz."


Try the Christophe Robin Regenerating Mask with Rare Prickly Pear Seed Oil (whew!), which protects both the scalp and the lengths and leaves hair deeply moisturised.


Sleep on it


"Braiding hair before sleeping will reduce the amount of movement at night as this adds friction when sleeping," adds Garrett. "Using a silk pillow can help prevent breakage too so pack one in your suitcase as it won’t take up any room. To tie hair up at night I would recommend snag-free hair ties as they will help avoid hair breakage."


Shampoo against humidity


"When washing hair in a humid place, only use shampoo on your roots and rinse it through, so it won’t dry out the hair," says Wild.


Another tip, which is a bonus for lazy washers, is to not over-wash the hair. "This will strip it of its natural oils, making hair more frizzy," says Garrett. "Over-drying hair is going to damage it so dry on a low heat and don’t put texture into it with texturising sprays, as this will emphasise frizziness. It’s better to use oil-based products when styling to counteract fluffiness and fizziness – Kiehl’s Creme with Silk Groom (£18) is good to use on hair after blow-drying as a finishing product due to its non-greasy texture."


See a professional


Boringly, this is once again advisable if you're going to be struggling through humidity for any length of time. "Kate’s hair is naturally curly and at the moment she doesn’t have many layers in it, which makes dealing with humidity hair easier," says Wild.


If you do have layers, now might be the time to start letting them grow out. The same is true of short-haired people. As a person who once watched her chin-length bob grow and grow until it reached the triangular levels of Dora the Explorer's cut, I speak from painful experience.


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