Green Rest Onyx Mattress – Firm Pocket Spring Mattress with High-Density Foam & Circular-Knitted Fabric | 31cm Height | Ergonomic Medical Support, The Green Rest Onyx Mattress is designed for those who need firm, medical-grade support without compromising on comfort. Built with independent pocket springs, each spring adapts individually to body movement, ensuring proper spinal alignment and even weight distribution. Engineered with durable wire pocket springs encased in 7 cm of flexible foam, the Onyx offers exceptional stability and long-lasting performance. Additional layers of high-density compressed foam and Eurolux foam provide resilience, cushioning, and pressure relief—making this mattress particularly suitable for individuals with higher body weight or anyone seeking a firm orthopedic-style sleep surface. Finished with a three-layered circular-knitted fabric, the Onyx Mattress ensures enhanced breathability, reducing sweat build-up and maintaining a fresh sleeping environment. With a total height of 31 cm, it stands tall as a premium firm pocket spring mattress built for durability, ergonomics, and healthy sleep. 🌟 Key Features: Firm Pocket Spring System – Reinforced springs with durable wire for uniform, long-lasting support. High-Density Foam Layers – Thick Eurolux and compressed foam provide stability and firm comfort. 7 cm Flexible Foam Encasing – Surrounds springs for durability and edge-to-edge support. Ergonomic Design – Independent springs adapt to body shape, supporting natural posture. Circular-Knitted Fabric – Breathable, three-layered finish reduces sweating and enhances comfort. Medical-Style Firmness – Ideal for those needing orthopedic support or heavier body weight sleepers. 31 cm Total Height – Premium thickness for durability and strong structural support.