... is same. 4.High density foam. 5.Durable pocket spring. Product details:Pocket spring mattress: High quality jacquard fabric quilted with one layer 300g ... fabric,2cm latex,2cm convolute foam,pocket spring(2.15mm diameter),can be replaced by Bonnel spring.compressed packed. Available size:Twin ... a supplier , we now build a factory making spring and mattress.Compared to the other exporters, we have a huge ...