There are 3 main classes: buffer the core Layer, layer, layer fabrics and facilities.The core layer of padding to create frames and main bearing layer is the buffer. The durability and elasticity of mattress depends on the substance of this class.The class is class facilities between the layers of fabric and wrap the core layer, which helps adjust the soft firmness of the mattress to suit the user. For example, the class facilities by activated carbon would make more soft and cushioning.The layer is the layer of fabric cloth-wrapped outside the buffer. This class creates smoother surface for cushioning, and help increase the aesthetics for the buffer.
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