Choosing The Right 4000 Inner Spring Mattress

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How the coils springs are arranged The Offset Coil is an improvement on the original coil design called the Bonnell Coil. These coils are hourglass shaped; offset coils are more expensive, but conform better to the body. You can find some great coil mattresses at this 4000 spring mattress sale.

Pocketed Coils or "Marshall Coils" are coils individually wrapped in fabric pockets.