Mattress Foundations

Mattress foundations are the quiet workhorses of a healthy sleep system, giving your mattress firm, even support while helping air circulate beneath you. Our designs use sustainable coconut coir and other natural materials instead of metal grids or synthetic boards, creating a solid, breathable base that keeps your bed feeling stable, comfortable, and better protected over time. Whether you need to replace a box spring or add rigidity to a platform frame, these foundations ensure your mattress performs exactly as it was designed to.

A coir foundation adds structure and lift under a wide range of sleep surfaces, from dense cotton-and-wool builds to more cushioned natural mattresses and upgraded organic mattress designs. The firm, fibrous core distributes weight across the full surface of the bed, helping reduce sagging and improving alignment, while its open structure allows moisture to dissipate instead of lingering underneath the mattress.

For platform setups, our mattress foundations and inserts are an easy way to fine-tune support without changing the frame you love. They sit neatly inside or on top of solid wood platform beds, turning simple slat systems into a more continuous surface—especially helpful under thinner futon-style mattresses or latex cores that benefit from consistent contact and airflow.

If you’re drawn to low, grounded sleeping, these foundations also complement Japanese-inspired layouts and layered sleep systems. They can be used alongside firm bases like tatami platforms and mats or combined with breathable underlayers in natural bed rug collections to keep floor-friendly beds drier and better ventilated, particularly in humid climates or on solid floors.

High Rest Mattress Foundation - Comfort Pure

The "Lungs" of Your Sleep System

A mattress placed directly on a solid floor or plywood sheet cannot breathe. Moisture from your body gets trapped, leading to mold and premature degradation of natural materials like wool and cotton. Our Coconut Coir Foundations and slatted organic bases act as the lungs of your bed, allowing air to circulate freely beneath you. This continuous airflow regulates temperature and keeps your mattress dry and hygienic, which is critical for maintaining a healthy, allergen-free bedroom.

Natural Coconut Mattress Foundation - Comfort Pure

Height & Profile: Bunkie Boards vs. High Foundations

Finding the right bed height is a matter of comfort and aesthetics.

  • Low Profile (Bunkie Boards): If you love your bed frame but it sits too high with a standard box spring, our Organic Bunkie Boards (approx. 2 inches) provide essential rigid support without adding bulk. They are perfect for modern platform beds or bunk beds.
  • Standard Height (High-Rest): For those who find low beds difficult to get in and out of, our High-Rest Foundations add significant lift (up to 8 inches), giving your bed a traditional presence and making morning routines easier on your knees and back.
High Rest Mattress Foundation - Comfort Pure

Pure Materials for a Non-Toxic Base

Conventional box springs are often made with untreated plywood, cardboard, and synthetic fabrics treated with flame retardants. We use only clean, durable materials. Our foundations feature solid spruce or fir wood structures, coconut coir fiber for natural shock absorption, and covers made from organic cotton and wool. This ensures that the foundation of your bed is just as safe and chemical-free as the mattress resting on top of it.

Frequently Asked Questions: Mattress Foundations

Do I need a foundation for my platform bed?

It depends on your slat spacing. Most natural latex and wool mattresses require slats to be no more than 3 inches apart. If your platform bed has wide gaps (4+ inches), adding a Bunkie Board or Coconut Foundation is essential to prevent the mattress from dipping between the slats and losing its support.

What is the difference between a box spring and a foundation?

"Box springs" were originally designed with metal coils to add bounce to innerspring mattresses. Modern "foundations" are rigid wood structures designed to provide a flat, non-flexing base. Since foam and hybrid mattresses are heavy and flexible, they require the solid, rigid support of a foundation, not the bounce of a box spring.

Why choose a Coconut Coir foundation?

Coconut coir is nature’s perfect shock absorber. It is incredibly durable, resistant to mold and mildew, and offers superior breathability compared to solid wood or fabric-wrapped foam. It provides a firm, flat surface that extends the life of your mattress by preventing moisture buildup.

Can I put these foundations on a metal frame?

Yes. Our High-Rest Foundations and Organic Foundations are designed to work perfectly on standard metal bed frames, converting a basic metal perimeter into a complete, supportive bed system.

Are these foundations chemically treated?

No. We use untreated, kiln-dried woods and organic textiles. We do not use chemical flame retardants, formaldehyde glues, or synthetic barriers. Our foundations meet flammability standards through the use of natural wool, which is inherently flame-resistant.

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