SleepTech Magazine / May - June 2017
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79<br />
the first individually wrapped<br />
pocketed spring coil mattress<br />
now commonly known as Marshall<br />
coils as described below.<br />
UPHOLSTERY LAYERS,<br />
PADDING<br />
Upholstery layers provide<br />
cushioning and comfort. Some<br />
manufacturers call the mattress<br />
core the “support layer”<br />
and the upholstery layer the<br />
“comfort layer.” The upholstery<br />
layer usually consists of three<br />
parts: the insulator, the middle<br />
upholstery, and the quilt.