When sourcing handbags, material selection is the primary determinant of price and longevity. For Genuine Leather, verify if it is Full-Grain or Top-Grain, as these offer the highest durability and develop a patina over time. For Synthetic Leather (PU/PVC), ensure it meets environmental standards like REACH or RoHS to avoid chemical odors and skin irritation. For fabric bags (Canvas/Nylon), check the Denier (D) count; a higher denier indicates better tear resistance. Always request colorfastness test reports to ensure the dye does not transfer to the user's clothing.