1.Tight top, one side.    
2.Nice quilting pattern.
3.Blue edge tape.   
4.Border and top fabric is same.

Construction:

Knitting Fabric,
2 cm foam (20Kg)
14g non-woven fabric,

Hard polyester felt liner (500g/m2),
pocket spring (wire:2.15mm,height:15cm), with border steel wire/rod (5 mm), 5 turn coils, foam edge protection at corners,
Hard polyester felt liner (500g/m2)

14g non-woven fabric,
2cm foam (20Kg),
Knitting Fabric.