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Your Phone Case Is Shedding Microplastics Into Your Skin

What the latest peer-reviewed science says about plastic phone cases and your health — and why natural leather is the safer choice.

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1,122

Particles per cm²

Average microplastic abundance found on protective mobile phone case surfaces during 3-month study.

Journal of Hazardous Materials, 2023

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314

Particles on Your Palm

Microplastics transferred directly from phone cases to users' hands through daily handling.

Journal of Hazardous Materials, 2023

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33

Days Until Sharp Increase

Dramatic microplastic generation begins after just over one month of daily phone case use.

Monte Carlo Simulation, J. Hazard. Mater.

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4.5×

Higher Risk

Patients with microplastics in arterial plaque were 4.5× more likely to experience heart attack, stroke, or death.

New England Journal of Medicine, March 2024

The Hidden Cost of "Protective" Cases

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Plastic & Silicone Cases

Made from petroleum-based polymers (TPU, polycarbonate, silicone blends) that degrade through mechanical weathering. Friction, heat, UV exposure, and skin oils accelerate breakdown, releasing microplastics you absorb through skin contact and inhalation.

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Natural Leather Cases

MUSO cases use full-grain vegetable-tanned leather from heritage tanneries. Zero petroleum plastics means zero microplastic shedding. Leather develops a natural patina over time — it doesn't break down into harmful particles that enter your body.

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Health Impact

Microplastics detected in human brain tissue (2024), heart tissue (2023), placenta (2021), breast milk (2022), and bloodstream. Linked to inflammation, immune dysfunction, and endocrine disruption.

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Better for You & Planet

Leather is biodegradable, plastic is not. While microplastics persist in the environment for centuries, natural leather returns to the earth. You're holding your phone 2-3 hours daily — make those hours safer.

Choose Natural. Choose Health.

Your phone case is the item you touch most each day. Switch to natural leather and eliminate a daily source of microplastic exposure.

Why MUSO?

  • Quality


    At MUSO, we craft using the same leathers found in boutique and high-end designer brands, letting the material speak for itself.

    We believe people should buy the product, not the brand, which is why our cases carry no exterior logo.

    The leather does the talking.


    Try the Barenia iPhone 17 Case 

  • Transparency


    We go beyond vague “premium leather” claims. Every MUSO product lists the exact tannery and leather name, so you know exactly what you’re getting. No funny business; we stand by our material choices.

    (For example, BARENIA® from Tanneries HAAS, France.)



    Learn more about BARENIA® 

  • Customer & Community Oriented


    Our community helps shape future designs through the “Share Your Thoughts” survey.


    Those who use our products understand them best and with their feedback we shape the next generation of MUSO designs.





    Share Your Thoughts 

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Discover Our Cases

Learn about Barenia Leather

  • Barenia Leather

    What is Barenia (Novonappa) Leather?

    Muso Goods

    Due to Barenia occupying a special place in the heart of every collector, designer, and leather enthusiast, we here at MUSO aim at honoring this leather through our craft.

    What is Barenia (Novonappa) Leather?

    Muso Goods

    Due to Barenia occupying a special place in the heart of every collector, designer, and leather enthusiast, we here at MUSO aim at honoring this leather through our craft.

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