Innerspring mattresses or coil mattresses are gradually becoming popular in the marketplace. An innerspring or coil mattress has two areas; One consisting of the spring zone which provides support for better spinal alignment while sleeping.

The other area is referred to as the comfort layer and is constructed of foams and other fibres to provide various levels of comfort and to add a softer feel to the mattress.

Some innerspring mattresses also feature a pillow-top layer usually constructed of foam to add additional comfort.