Medium is the level of support to the body, suitable for all average weighted people. This is not a comfort rating.
Open Coil are Bonnel springs in an hourglass shape, joined creating an open coiled mattress.
Mattress Depth 16 cm
One Sided mattress, no need to turn this mattress, but rotation is recommended.
Source 2 Domestic Flamability Rated Source 2 for Low Hazard, General Domestic use
The manufacturer will provide a 5 year guarantee on this product against material faults & workmanship. More info