Your Heatwave skincare survival guide

Why Summer heat can disrupt the skin barrier – and how to protect it

As temperatures rise and summer heatwaves approach, your skin is exposed to far more than just sunshine. Increased UV exposure, high temperatures, air pollution and dehydration can all place stress on the skin barrier, often leading to dryness, sensitivity, congestion and dullness.

One of the biggest contributors to these summer skin changes is something called TEWL – transepidermal water loss.

What is TEWL?

Transepidermal water loss (TEWL) is the natural process where water evaporates from the skin into the environment.

Healthy skin barriers help regulate this process, keeping moisture levels balanced while protecting against external aggressors. But during heatwaves, TEWL can increase significantly due to:

·         Higher temperatures

·         UV exposure

·         Air conditioning

·         Pollution

·         Excessive sweating

·         Over-cleansing or harsh skincare

When TEWL increases, the skin loses hydration faster than it can replenish it.

The result?

·         Tight, dehydrated skin

·         Increased sensitivity

·         Redness and irritation

·         Excess oil production

·         A compromised skin barrier

·         Faster visible ageing

This is why skin can feel both oily and dehydrated during summer.

That’s why summer skincare should focus on:

·         Hydration

·         Barrier support

·         Antioxidant protection

·         Daily SPF

Hydration First: Supporting TEWL

Hyaluronic Acid Serum

When skin loses water through increased TEWL, humectants like Hyaluronic Acid become essential.

Our Hyaluronic Acid Serum uses Triple Molecular Weight Hyaluronic Aid to draw moisture into multiple layers of the skin, helping maintain hydration levels without heaviness.

Clinically proven to boost moisturisation by 22% after 28 days, it leaves skin looking plumper, smoother and more refreshed . Lightweight and fast-absorbing, it layers perfectly underneath SPF.

Rose Facial Spritz

Heatwaves can leave skin feeling overheated and uncomfortable throughout the day.

The Rose Facial Spritz provides instant cooling hydration while helping support moisture levels and calm sensitivity.

Clinically proven to increase skin moisturisation by 16% within 20 minutes, this ultra-fine mist is ideal for:

·         Cooling skin during heatwaves

·         Refreshing make-up

·         Hydrating throughout the day

·         Supporting skin comfort during increased TEWL

Top tip: Keep it in the fridge for an extra refreshing boost.

Herbal Toner

When skin feels congested or reactive in warmer weather, balancing hydration becomes even more important.

Powered by Chamomile, Calendula and Green Tea, the Herbal Toner helps:

·         Calm irritation

·         Support the skin barrier

·         Deliver lightweight hydration

·         Refresh overheated skin

Clinically proven to boost skin moisturisation by 17% after 20 minutes, it’s ideal for sensitive or environmentally stressed complexions.

Daily SPF: Your Most Important Step

UV exposure remains one of the leading causes of premature skin ageing, pigmentation, collagen breakdown and barrier damage.

Even on cloudy days, UVA rays remain present – which is why SPF should be worn 365 days a year.

SPF Heroes

Designed for modern environmental stressors, UV365 offers:

·         UVA and UVB protection

·         Blue light defence

·         Antioxidant support

·         Lightweight daily wear

Powered by natural mineral filters, Hyaluronic Acid and antioxidant-rich botanicals, it helps protect while supporting hydration and skin comfort.

Why Antioxidants Matter

Sun exposure and pollution increase free radical activity, which weakens the skin barrier and contributes to oxidative stress and visible ageing.

Antioxidants help neutralise this damage before it impacts the skin long-term.

Antioxidant Duo

Our Antioxidant Duo helps support healthier-looking skin during environmental stress and is clinically proven to reduce TEWL by 19.8%.

Perfect for maintaining healthier-looking, resilient skin during summer months.

Don’t Forget After Sun Care

Sun exposure continues to affect the skin long after you leave the sun. Heat and UV can leave skin dehydrated, tight and sensitive.

After Sun

Our After Sun helps:

·         Is clinically proven to boost hydration by 30.7%

·         Calm overheated skin

·         Support barrier recovery

·         Maintain a healthy-looking glow

Healthy Skin starts with protection

Heatwaves can increase dehydration and weaken the skin barrier through TEWL, but the right routine can help keep skin balanced, calm and glowing.

Because health skin isn’t just about glow – it’s about protection too