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L4B Zephyr Cold Brew


What is the L4B?

moss founder Celestyna created the L4B as a place to fulfill her curiosity and creativity. New ingredients, formulations, and techniques are tested, including ultra powerful and specific products Celestyna creates for her seasonal needs. Some of these exceptional creations we make available for you as couture experimental skincare – extremely limited quantity and always expertly hand-crafted by the proprietress herself.

At the end of the year we consult all of our L4B participants and consider adding a favorite L4B formulation to the permanent moss collection.

Please note, due to the foundational concept of the lab, each batch will vary slightly – it may have slightly different ingredients and different percentages of ingredients. The L4B is NOT a conventional, static skincare line – it is a formulator’s playground.




The concept:

A potent yet very gentle anti-acne product that functions as a:

Moisturizer (lovely oils, butters and a beautifully ooey-gooey hydric moisture complex.)

Serum (17!!! anti-acne actives) and…

A mask (there’s just enough Zinc Oxide in there that it leaves a protective veil, yet it is feather light and quick to disappear into the skin.

I designed this for a pre-teen, so it’s extremely gentle, but also absolutely packed full of Nature’s acne fighters in just the right concentrations to support (not overwhelm) tender skin.

My hope is that this could be as powerful as Illumina but gentler and easier to use. It has basically ALL the actives from Illumina (except the exfoliants) AND we’ve added ingredients to reduce the specific type of inflammation caused by p.acnes bacteria, as well as ingredients to strengthen skin cells so they don’t rupture and spread bacteria as easily.

Same ingredients as Illumina:

Saw Palmetto

Herbal Complex

Vitamin C (SAP)

Ingredients not found in Illumina but that are fantastic and gentle for acne include:

Zinc Oxide







Size: 20ml


Water, Zinc Oxide, Ucuuba Butter, Sodium Ascorbyl Phosphate, Niacinamide, Meadowsweet Extract, Gluconodeltalactone, Bakuchiol, Saw Palmetto Extract, Allantoin, Black Cumin Seed Oil, Dimethyl Isosorbide, Bisabolol, Resveratrol, Polyacrylate Crosspolymer-6, Glyceryl Oleate Citrate, Caprylic/Capric Triglyceride, Dehydroxanthan Gum, Caprylhydroxamic Acid, Glyceryl Caprylate, Glycerin, Sodium PCA, Urea, Trehalose, Polyquaternium-51, Sodium Hyaluronate, Myrtle Oil, Manuka Oil, Blue Tansy Oil, Rose Absolute, Lemongrass Oil


Apply sparingly to clean skin. Avoid excessive exfoliant use when using this product as it contains ingredients to encourage cellular turnover. Apply with other serums, after cleansing and toning and before heavier moisturizers and oils. For best results, apply in the evening, as skin heals best overnight.

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