Spring unit for a mattress

The present invention is a spring unit for a mattress comprising first and second pocket springs. Each of the first and second pocket springs comprise a coil pocket comprising a pocket and a coil spring disposed in the pocket and a cushion pocket comprising a pocket and a first resilient member disposed in the pocket of the cushion pocket. Each cushion pocket is engaged with and acting only upon the corresponding coil pocket. Substantially the entire side of the pocket of the coil pocket of the first pocket spring is engaged with substantially the entire side of the pocket of the coil pocket of the second pocket spring. Each cushion pocket is free standing and not connected with each other thereby creating a pumping action upon depression of the first pocket spring and/or the second pocket spring that produces circulation of air within the mattress.