FIELD: furniture industry. SUBSTANCE: springy mattress has plurality of interconnected members made in the form of spiral springs, and at least two layers extending in parallel with mattress surface, each of said layers having different resiliency. One and the same spiral springs are passing through both layers. Spiral springs exhibit larger extent of shifting only along part of their length to form the same layers exhibiting different resiliency. EFFECT: reduced production costs, improved convenience and comfort. 15 cl, 4 dwg
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