SPF+50 C.O.D.A by Sonia Sélaire

Formulated in collaboration with skincare expert Sonia Sélaire, SPF+50 C.O.D.A is a high-protection daily suncream engineered for modern skin longevity.. Independently tested by WENEOS, the formula delivers broad-spectrum SPF 50+ protection with a UVA Protection Factor of 62 and a critical wavelength of 375 nm..

Combining advanced photoprotection with an elegant, non-greasy texture, the formula blends seamlessly into skin with a transparent and a naturally luminous finish while remaining comfortable for daily wear, especially under makeup. Applied as the final step of the Synfonie Skincare Maestro morning routine, SPF+50 C.O.D.A reflects a formulation philosophy rooted in scientific precision, performance, and cosmetic elegance..

At a Glance

• Developed in collaboration with skincare expert Sonia Sélaire
• Broad-spectrum SPF 50+ protection against UVA and UVB radiation
• Independently tested by WENEOS: SPF 72.4 (labelled SPF 50), UVA Protection Factor 62, critical wavelength 375 nm. 
• Elegant, non-greasy texture with a transparent, naturally luminous finish
• Suitable for all skin types, including sensitive skin
• The final step in the Synfonie Skincare Maestro morning routine
• 60ml - approximately 2 months' supply when used daily as a facial SPF 
• Fully recyclable packaging

What is SPF+50 C.O.D.A? 

SPF+50 C.O.D.A  is a high-protection daily face sunscreen offering SPF 50 broad-spectrum coverage, meaning it protects against both UVA and UVB radiation. UVB rays are primarily responsible for sunburn and surface-level skin reddening, while UVA rays penetrate more deeply into the dermis, contributing to premature visible ageing and uneven pigmentation over time. Broad-spectrum protection addresses both.

The name C.O.D.A reflects the formula's four-part skin philosophy: Corrige (corrects), Optimise (optimises), Défend (defends), Apaise (soothes). Together, these principles shape a sunscreen developed not only to protect skin daily, but to support overall skin quality and cosmetic comfort with continued use.

The texture is non-greasy and absorbs easily into skin, making it comfortable to wear daily - alone or layered beneath makeup. It is formulated for all skin types, including sensitive skin.

Developed as the concluding step in the Synfonie Skincare Maestro morning routine, the cream sits within a complete skincare system created in collaboration with skincare expert Sonia Sélaire, whose expertise spans both the functional and sensory dimensions of formulation.

The Science Behind the Formula

Broad-Spectrum UV Filters

SPF+50 C.O.D.A combines three photostable organic UV filters:

• Diethylamino Hydroxybenzoyl Hexyl Benzoate
• Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine
• Ethylhexyl Triazone

These work alongside Titanium Dioxide, a mineral UV filter that helps protect skin by reflecting, scattering, and absorbing UV radiation. Together, the filters provide balanced broad-spectrum SPF 50+ protection across both UVA and UVB wavelengths.

All filters are authorised under Annex VI of EU Cosmetics Regulation (EC) No. 1223/2009, retained in UK law (1). 

How It Was Tested

SPF+50 C.O.D.A was independently tested by WENEOS, a specialist French laboratory recognised for its expertise in advanced sunscreen evaluation, using the HDRS hybrid testing method in line with ISO 23698:2024 standards.

This next-generation methodology combines in vivo and laboratory analysis to provide a comprehensive assessment of sunscreen performance across the full UV spectrum. The formula is first applied to human volunteers, where skin reflectance measurements are used to evaluate UVA protection under real-use conditions. These findings are then combined with laboratory data assessing how the formula behaves under controlled UV exposure.

Together, these complementary measurements provide a robust evaluation of both UVB and UVA protection performance.

Tested across 12 subjects, the results confirmed:

• Mean SPF: 72.4, labelled as SPF 50+
• UVA Protection Factor: 62
• Critical wavelength: 375 nm

What the UVA Result Means 

Under EU regulations, a critical wavelength above 370 nm is required to support a broad-spectrum protection claim. SPF+50 C.O.D.A exceeded this threshold with a measured critical wavelength of 375 nm (2).

The UVA Protection Factor of 62 is where this formula stands apart. Most SPF 50+ sunscreens are formulated to meet the minimum EU requirement, which for a labelled SPF 50+ is a UVA-PF of just 16.7. A 2026 study testing 38 SPF 50 and SPF 50+ products found UVA-PF values as low as 3.6, and around one third failed EU standards altogether (14). SPF+50 C.O.D.A achieves a UVA-PF of 62, nearly four times the minimum threshold.

In simple terms: the SPF tells you how well a sunscreen protects against sunburn. The UVA-PF tells you how well it protects against deeper, longer-term skin damage. Both matter. This formula is designed to deliver on both.

Skin-Supportive Actives

Alongside the UV filters, the formula includes skin-supportive actives: Panthenol (provitamin B5) and Tocopheryl Acetate (vitamin E) help maintain barrier function and antioxidant defence (8,9); Ferulic Acid contributes further environmental protection (10,11); and Dipotassium Glycyrrhizate (liquorice root) and Bisabolol (chamomile) bring a calming profile particularly suited to sensitive or reactive skin (12,13).

Texture and Skin Feel

The cream's smooth, blendable texture is shaped by Dimethicone and Dimethiconol - silicone-derived ingredients that help the formula spread evenly and sit comfortably under makeup or on bare skin. Silica assists with shine control and helps the finish remain comfortable even with daily wear.

Although Titanium Dioxide is a physical filter - a filter type associated with white cast in some formulations - this formula is specifically optimised to minimise that effect, making it suitable for a broader range of skin tones.

Why Sun Protection Is the Foundation of Skincare Longevity

Dermatologists consistently identify daily SPF as the single most effective step for slowing the visible signs of UV-driven skin ageing. A clinical trial published in the Annals of Internal Medicine found that people who applied sunscreen every day showed measurably younger-looking skin after 4.5 years, compared to those who used it only sometimes (3). UV exposure does not stop when summer ends: UVA rays reach the skin year-round, on cloudy days and through windows (4), making SPF 50 a habit worth keeping every morning. 

This formula has been independently tested to confirm it delivers on the claim: a critical wavelength of 375 nm and a UVA Protection Factor of 62 against a labelled SPF of 50, providing balanced, broad-spectrum protection (2).

The Synfonie line is built on the principle that outer and inner skin health work together. The Skin, Hair and Nails Bundle offers the nutritional counterpart to this daily suncream ritual.

How to Use SPF50+ C.O.D.A 

Morning skincare should feel considered, not clinical. Here is how to make  SPF50+ C.O.D.A  the final, purposeful step in yours.

• 1.     Begin with clean skin. Start your morning ritual with the Prélude Cleanser, then apply your antioxidant serum and moisturiser - either the APOTHÉOSE SOIN VELOURS (dry skin) or SOIN CARESSE (combination to oily skin).
• 2.     Apply the SPF50+ C.O.D.A  as your final step. Dispense an amount sufficient to cover the face and neck and ears evenly. Apply every morning before sun exposure, regardless of the season or forecast.
• 3.     Reapply during prolonged sun exposure. For extended time outdoors, reapply approximately every two hours, and immediately after swimming or towelling dry (5). For a standard indoor working day, your morning application provides continuous coverage.

Complete the Ritual - Explore the Synfonie Skincare Maestro Line

The SPF50+ C.O.D.A  is the final step in a complete ritual. The Synfonie Skincare Maestro morning routine: Prélude Cleanser → antioxidant serum → APOTHÉOSE Soin velours or soin caresse → SPF50+ C.O.D.A . The Cadence Eau de Parfum completes the collection. To give or receive the full ritual, the Synfonie Gift Box, Gift Box + SPF, and Gift Box + Perfume are the natural starting point.

For those who believe skin health starts from within, the Skin, Hair and Nails Bundle offers complementary nutritional support — the inner companion to this daily suncream ritual.