Focus on Total Cost of Ownership (TCO) rather than just the unit price. Negotiate for spare parts kits (extra buckles, zippers, and mounting bolts) to be included at no extra cost, which reduces your after-sales service burden. For long-term partnerships, request OEM/ODM customization such as logo embroidery or custom colorways, which adds brand value. Always confirm the Incoterms (typically FOB or CIF) and ensure the supplier provides a 12-24 month warranty on the shell and mechanical components.