... with strong rebounding elasticity ,and is durable, soft , comfortable . The mattress is covered with environment-friendly hot-melt carpet fibers ... quilted with cotton environment-friendly material and multi high-resilience foam , besides, specially designed anti-mite and anti-bacterial ... wire guage 2.3mm,6 turns, Φ78*160cm10) Inner foam: 5cm foam encased, around the spring,density: 45kg/ m³11) ...