What is an Innerspring Unit?

An innerspring unit is a network of interconnected coils that provide support in spring-based mattresses.


At the heart of any traditional spring-based mattress lies an innerspring unit, a core component designed to provide both support and comfort to sleepers. This unit comprises numerous coils, typically made from steel, that are interconnected in a variety of ways to create a supportive mesh. The arrangement and connectivity of these coils play a significant role in defining the firmness, support, and overall feel of the mattress.

Different types of innerspring units exist, such as Bonnell, pocketed, continuous, and offset coils, each offering unique benefits. For example, pocketed coils are individually wrapped in fabric, reducing motion transfer between partners and contributing to a more peaceful night's sleep. On the other hand, Bonnell coils, one of the oldest and most common types, offer a firmer support at a more accessible price point.

The durability and breathability of innerspring units are also notable advantages. These units promote air flow within the mattress, helping to regulate temperature and keep the sleeping environment comfortable. Additionally, the steel construction of the coils contributes to the longevity of the mattress, making it a durable choice for consumers.


Innerspring units are primarily found in traditional mattresses, offering support and comfort to sleepers. They can vary widely in design and firmness, catering to a range of sleep preferences. Some people prefer the bouncy, responsive feel of an innerspring mattress for ease of movement during sleep, while others might choose a specific coil type for its unique benefits, such as reduced motion transfer or enhanced edge support.


  • What are the different types of innerspring units?

    The main types include Bonnell, pocketed, continuous, and offset coils. Each type has its distinct structure and advantages, making them suitable for different sleep preferences and needs.

  • How does an innerspring unit affect mattress durability?

    The steel construction of the coils in an innerspring unit contributes to the durability and longevity of the mattress. It provides a sturdy support system that maintains its shape and comfort over time.

  • Can innerspring units help with temperature regulation?

    Yes, the structure of innerspring units promotes air flow within the mattress, which helps in regulating temperature and creating a cooler sleeping environment.

Practical Application

When choosing a mattress with an innerspring unit, consider the types of coils used and their arrangement, as these factors significantly affect the mattress's firmness, support, and overall comfort. Additionally, those who share a bed might favor pocketed coils for their ability to reduce motion transfer, ensuring a more restful night's sleep for both partners.