20 Bestsellers at Sephora to Make Bad Hair Days a Thing of the Past

While you're asleep, this bestselling Kérastase Nutritive 8H Magic Night Serum ($55) will be hard at work hydrating hair so it's soft, moisturised, and easy to style when you wake up again. There's iris root extract inside this leave-in product to coat hair and keep natural nutrients locked in, along with a blend of vitamins to seal roots with a satiny finish.

The perfect hair day doesn't need to be a thing of dreams since this Living Proof Perfect Hair Day Dry Shampoo ($14-$36) not only masks odour in less-than-fresh styles with a time-released fragrance, it actually uses powders to soak up oil and clean hair, too. It also won't leave hair feeling weighted down or sticky (according to many of the Sephora shoppers who've reviewed this product).

If a round brush is a key tool in your hair-drying routine, this Drybar The Double Shot Blow-Dryer Brush ($150) combines that item with your blow dryer so you just need one tool (and hand) to quickly create sleek styles. It's also a bestseller that's earned top marks from other Sephora shoppers.

Not only is this Olaplex No. 4 Bond Maintenance Shampoo ($14-$28) one of the bestsellers for people with colour-treated hair, it can help with any external stressors like cold weather or excessive heat styling, all while you wash. It limits breakage and works to make hair stronger in the future, too.

The also-popular Olaplex No. 5 Bond Maintenance Conditioner ($14-$28) boosts the work of the bestselling shampoo and further relinks hair's broken bonds, so split ends and frizz are repaired. There are also argan, avocado, and grape seed oils inside that leave hair softer, shinier, and easier to manage.

Bumble and Bumble Hairdresser's Invisible Oil Heat and UV Protective Primer ($13-$28) is a bestselling leave-in treatment that conditions hair that could use a little love in the moisture department. And, even if you're not heat styling your hair, the blend of six oils also include UV filters to shield against damage from the sun.

If your goal is creating more manageable styles postshower, this bestselling Ouai Leave-In Conditioner ($26) offers protection against heat styling while reducing frizz, flyaways, and tangles all the while.

Not only are this brand's pillowcases popular, the Slip Slipsilk Scrunchies ($20-$39) are also bestsellers at Sephora. Much like the pillowcases help protect your hair from breakage or creasing while you're asleep, these soft scrunchies do the same thing when you use them in your day-to-day styles — either the three minis' set or the kit with six larger versions.

There are nearly 7,000 reviews for this Josie Maran 100 percent Pure Argan Oil ($17-$96). It's not only a top-rated product for your face, it can also treat split ends and limit flyaways in your hair styles.

Whether you need deep conditioning on the daily or just every week or so, the bestselling Amika Soulfood Nourishing Mask ($12-$28) leaves hair silky without weighing it down whenever its added to your showering routine. Hair is strengthened and moisturised, plus the mask adds in vitamin C to help fight free radicals and boost hair growth, too.

The bestselling Dyson Airwrap Styler ($549) does double-duty getting hair sleek and dry, while also adding curls or waves . . . all at the same time. There are three heat settings, so it doesn't need to use high heat to get hair dry and styled, making it ideal for anyone who doesn't want to overstress hair, or use two different tools to get their desired end look.

A POPSUGAR editor favourite, the Briogeo Scalp Revival Charcoal + Coconut Oil Micro-exfoliating Shampoo ($42) uses charcoal to draw out impurities from the scalp, while hydrating coconut oil takes on flakes and dryness. It's like exfoliation for your head — with bonus tea tree oil to heal irritation and leave your scalp and follicles more balanced in the future.

As the name implies, the Moroccanoil Moisture Repair Conditioner ($11-$25) uses argan oil, fatty acids from coconut oil, and plant extracts (including chamomile) to nourish and detangle. The bestseller also uses keratin to strengthen hair, whether its weakness came from chemical treatments, heat, or something else entirely.

Bumble and Bumble Thickening Dryspun Volume Texture Spray ($15-$47) isn't a dry shampoo, but it does some of the same things you'd expect from that product, especially for people with fine hair (according to the top reviews). The mist absorbs oil with raw silk powders, so hair looks weightless and clean throughout or, when applied specifically to the roots, it also creates added lift and volume there.

This bestselling Briogeo Don't Despair, Repair! Deep Conditioning Mask ($36-$115) has close to 1,500 five-star reviews. The blend of nutrients inside this mask like collagen, silk, rose-hip oil, and vitamin B help brittle, overprocessed hair now . . . and protects against future damage at the same time.

The Dyson Supersonic Hair Dryer ($399) has racked up nearly 50,000 loves from other Sephora shoppers for creating smoother, sleeker styles in less time and with less heat. Plus, the powerful motor is in the handle, so the different balance of weight (compared to a traditional dryer) makes it easier to hold while in use.

There are so many uses for this bestselling Living Proof Perfect Hair Day 5-in-1 Styling Treatment ($21) that it's no surprise it's a bestseller at Sephora. Applying it tackles five common hair wishes — for smoothness, extra volume, deep conditioning, strength, and polish — before you begin styling, and there's UV protection later on, too.

If you're looking for ultimate shine, this Kérastase Elixir Ultime Oil Serum ($24-$50) bundles up four different oils — maize, procaxi, argan, and camellia — to leave you with smooth, glossy hair. It's earned a 93 percent recommendation rating from other Sephora shoppers for this very result already.

The very best selling flat iron on Sephora's site is this GHD Platinum+ Professional Performance 1" Styler ($249). It has predictive technology inside that can recognise your hair's thickness and adjust its temperature accordingly — and also heats up equally across the plates for a quicker path to shiny, straight styles.

The perennially popular Moroccanoil Treatment ($15-$44) uses fatty acids to improve your hair's health. Some come from nourishing argan oil (which is also rich in vitamin E and other protective antioxidants) and others from linseed extract, which offers the alpha linolenic acid to lock in moisture and stimulate hair growth, too.