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.
Fibre Fillings fillings are 100% polyester, man made, very durable, great recovery.
Source 5 Domestic Flammability Rated BS 7177 Medium Hazard, Hotels, Universities, Holiday Camps, Retirement Homes.
Mattress Depth 22 cm
Two Sided Two sleeping sides, turn and rotate frequently.