What is Bonnell Coil?

Bonnell Coil is a type of coil used in innerspring mattresses for support.


When it comes to a restful night's sleep, the quality and type of your mattress plays a pivotal role. Among the various components that make up a mattress, the Bonnell Coil system stands out as one of the most traditional and widely used support structures in innerspring mattresses. Characterized by its hourglass shape, this coil system is interconnected with a wire that forms a spring mesh, ensuring uniform distribution of weight and added durability.

The Bonnell Coil system originated in the 19th century and has since been a staple in the mattress industry. Its design allows for a firmer sleep surface, which can be beneficial for back and stomach sleepers who require more support. However, it's worth noting that while the Bonnell Coil system provides robust support, it may not offer the same level of motion isolation as more modern coil systems, such as pocketed coils. This means that movement on one side of the bed is more likely to be felt on the other side.

Despite its lower motion isolation, the Bonnell Coil system remains a popular choice due to its durability, support, and cost-effectiveness. It's often found in budget-friendly mattresses as well as some higher-end models, making it a versatile option for various consumers.


Bonnell Coils are primarily found in innerspring mattresses, serving as the base layer that provides support and durability. These coils help in distributing weight evenly across the mattress, ensuring a comfortable and supportive sleep surface. They are especially preferred in budget-friendly bedding solutions and are also featured in certain luxury mattress lines for their reliability and support.


  • What is the main advantage of Bonnell Coils?

    The main advantage of Bonnell Coils is their ability to provide firm support and durability at an affordable price, making them a popular choice for both budget-friendly and some luxury mattresses.

  • Are Bonnell Coils good for side sleepers?

    Bonnell Coils tend to create a firmer sleep surface, which may not be as comfortable for side sleepers who generally benefit from a softer, more pressure-relieving mattress surface.

  • How do Bonnell Coils compare to pocketed coils?

    Bonnell Coils are interconnected, providing a firmer support system but with less motion isolation than pocketed coils, which are individually wrapped and offer more targeted support and better motion isolation.

Practical Application

If you're considering purchasing a mattress with a Bonnell Coil system, it's important to consider your sleeping position and preferences for firmness and motion isolation. For those who prefer a firmer sleeping surface and do not mind a bit of motion transfer, mattresses with Bonnell Coils can be a great, cost-effective choice. However, if you share a bed and are sensitive to your partner's movements, you may want to explore mattresses with pocketed coil systems or memory foam for better motion isolation.