When sourcing Neolite rubber, the most critical factor is the Hardness (Shore A), which typically ranges from 90 to 95 Shore A to ensure the material mimics the firmness of natural leather while providing better durability. You must also verify the Abrasion Resistance (measured in mm³ loss), where a lower value indicates a longer lifespan for shoe soles. Additionally, check the Flex Resistance to ensure the sheets do not crack after repeated bending, and confirm the Specific Gravity (Density) is optimized—usually between 1.2 to 1.35 g/cm³—to balance weight and sturdiness.