... required8.Non slip, easy to maneuver wheel chairs and walkersATHLETIC PERFORMANCE1.Superior biomechanical design2.Level playing surface3. ... injuries, long-term exercise and competition are appropriate. 4, impact resistance: a tough elastic layer and buffer layer, can absorb ... , saving management costs. 13, Artistry: The special high elastic particles, surface color soft; granular surface, to prevent the ...