nisien Memory Foam Cooling Hybrid Mattress in a Box, 5-Zone Pocket Innerspring Mattress for Pressure Relief, Medium Firm Feel, No-Risk 100-Night TrialThis Serweet 12 inch queen mattress adopts unique 5 zone design to deliver exceptional support and comfort for your head, shoulders, waist, hips and legs. It has a total of 768 pocket springs with 1. 8mm and 2. 0mm wire diameter, distributing at a scientific interval across the mattress. These springs feature excellent elasticity to offer target support, while working independently without squeaking. Minimal transfer motion from or to your sleeping