When sourcing Tabi shoes, the most critical technical aspect is the split-toe construction integrity. You must ensure the reinforcement at the 'V' junction is durable to prevent tearing. For material selection, high-quality lambskin or calf leather is preferred for fashion Tabi, while heavy-duty canvas is standard for traditional work Tabi (Jiki-tabi). Additionally, verify the outsole material; for indoor use, soft leather or suede is ideal, whereas for outdoor/fashion use, vulcanized rubber or TPU outsoles provide necessary slip resistance and durability.