Bonnell Coils are a very traditional innerspring and the most common coil used in the industry. This hourglass-shaped wire coil is joined to adjacent coils by small wire spirals called helicals. This coil is manufactured with a 13.5 gauge wire which is one of the thicker options used in mattress innersprings. The thicker wire will provide you with great support and durability. We use a Bonnell Coil system in our Classic coil beds to deliver outstanding quality and reliable support at a value price that all sleepers can appreciate. These coils are a great option for children, young adults and guest bedrooms.