To provide flooring capable of lightening a burden imposed on legs when standing work on a floor is carried out for a long time and maintaining the comfortability of the flooring and a mattress capable of being used on a concrete floor.

The flooring contains at least a net-like elastic body, 50% compressive hardness is over ≥100 kg and ≤500 kg, and 75% compressive hardness is ≥2,000 kg and ≤5,000 kg. The mattress also contains at least the net-like elastic body, 50% compressive hardness is ≥100 kg and ≤500 kg, and 75% compressive hardness is ≥2,000 kg and ≤5,000 kg.