When sourcing chunky-soled or platform footwear (Buffalo style), you must prioritize sole material composition, typically High-Density PU (Polyurethane) or TPU for a balance of lightweight comfort and durability. Ensure the platform height is consistent across batches and that the bonding strength between the upper and the midsole meets international standards (typically >3.0kg/cm) to prevent delamination. For the uppers, verify if the material is genuine leather, premium nubuck, or high-grade synthetic PU, and request abrasion resistance test results.