Good in principle but fail
Good in principle but fail to block out sound effectively for shift worker sleeping.

Try our at-home blood test
Clinic-level accuracy on 38 key markers. Results and recommendations in just 72h.
4 pack
In stock. Next day delivery available.
Healf Zone members get free next day delivery on all orders.
Key Benefits
GOB's Quad is a truly compostable earplug made entirely from lab-grown mycelium, offering comfort, clarity, and peace of mind without harming the planet. With 20dB of consistent, balanced sound reduction, it softens disruptive noise across all frequencies—whether in hotel rooms, flights, gyms, or at live shows—without muffling important sounds.
Quad’s mycelium foam shapes to the ear like memory foam, ensuring a secure, pain-free fit that stays in place. Unlike synthetic plugs, Quad breaks down completely after use, returning nutrients to the soil with zero microplastics or toxins. Quad delivers chemical-free, body-safe hearing protection that respects both personal health and environmental impact.
Good in principle but fail to block out sound effectively for shift worker sleeping.
Every product undergoes our Healf Curation Process. With it, you can shop confidently knowing that every item has been tried and tested before it reaches you. Our Healf Curation Process includes three key steps: Brand Discovery, Expert Validation, and Community Testing. Through these, we assess quality, ingredients, effectiveness, and more, ensuring that every product empowers your wellbeing.
The Healf Source offers detailed insights into different aspects of wellbeing, as well as guidance, research, recipes, and more to help you invest in your personal wellbeing journey. You can also subscribe to our weekly newsletters for the latest updates at Healf and in the wellbeing industry. Subscribe via the sign-up block at the bottom of this page.
We love people who check ingredients as carefully as we do, so you'll find detailed information about the ingredients used on every product page (where applicable). If you see something you'd like to flag with us or have additional questions, please don't hesitate to get in touch—we'd love to hear from you.

Every product undergoes our rigorous Healf Curation Process, ensuring you are always getting the best when it comes to your wellbeing.