![]() When used as a comfort layer, like NanoCoil™, pocketed coils can offer higher coil counts and a resiliency that other comfort layers, like foam and latex, can’t provide. Before they’re placed in the pocket, the coils can be pre-compressed, giving them more firmness.īecause pocketed coils can be customized to almost any specification and comfort-level, they can produce a variety of unique feels. The fabric pockets are ultrasonically welded or glued together so coils can move independently, cradling and conforming to the sleeper. Pocketed coils are made by enclosing individual coils in their own flexible, breathable fabric pocket, resulting in reductions in motion transfer and noise. These mattresses are generally affordable, and usually quite comfortable, but they can allow for more motion transfer than other open coils. This can amount to higher coil counts, thinner gauges, and less steel used in manufacturing the units. Knotted offset coils will be more stable, while open-end offset coils offer more bounce.Ĭontinuous wire coils are formed using only one piece of wire for an entire row of coils. The squared ends of offset coils offer a more conforming feel than Bonnell coils and will deliver firm support and durability. Offset coils have a similar shape as Bonnell, but the tops and bottoms are squared off so the coils can fit together in rows. The knots at the tops and bottoms provide stability for a supportive surface. Bonnell coils are made with heavy gauges, using more steel. This basic coil design means Bonnell coil units are typically affordable and are often found in 300- to 400-count mattresses. The unit is finished with an outer rod that keeps the unit together and offers additional strength to the edge of the bed.īonnell coils have an hourglass shape with rounded tops and bottoms. Coils are helically laced using a thin-gauge spiral wire that holds the coils together in rows. The majority of mattresses are open-coil units. The fourth system consists of pocketed coils, which are encased in lightweight, breathable fabric. Three of these are open coils: Bonnell, offset, and continuous coils. Coils can typically be found in four coil system types. And, because they’re made of steel, coils are extremely durable and resist sagging, settling, or taking a body impression.Ĭoil counts can factor into the comfort and support level of a mattress, and affect the price of a mattress, though what’s more important is wire gauge and coil system construction. Coils also offer the ability to customize a mattress to individual preferences by adjusting coil counts, wire gauges, and coil turns within the unit. With a breathable design, coils allow a lot of airflow, keeping the sleep surface up to 28% cooler than foam mattresses. ![]() ![]() Whether open or pocketed, the engineering of coils offers exceptional support. Innersprings are the primary component in the majority of mattresses sold in America.
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