... , beautiful, healthy sleep helper, let your sleep like a melting baay.High grade feather mattress, with warmth retention ... perfect sleep.2.3mm wire spring, six ring spinal protection spring system, has rich flexibility, good resilience, strong ... durable.Mattress Structure Imperial MattressTop fabric:high-grade water proof fabricQuilted:2cm thick 30density foam quiltinginsulator:90g nonwowen ...