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Slip resistance of footwear sole and floor coverings is the characteristic which seriously depend on safety of human movement. There are some adopted standards which prescribe methods of slip resistance testing, but they are often criticized and revised. Tribological parameters are very important in human walking, running, jumping, etc. Friction mechanism of viscoelastic materials on hard bases is described in this paper. Also, influence of some parameters, like rubber hardness, rubber hysteresis, contact condition (dry and wet) and sliding speed are analysed according the testing results obtained in performed experimental research.