When sourcing men's bags, material choice dictates both durability and market positioning. For Genuine Leather, prioritize Full-Grain or Top-Grain leather for premium markets, as they offer the best longevity and patina. For functional or tech-oriented bags, look for High-Density Nylon (e.g., 1680D Ballistic Nylon) or Water-Resistant Polyester with TPU coating. Ensure that all materials meet REACH or RoHS standards to avoid hazardous substances like lead or phthalates, especially for the European market.