Global Luxury Luggage Market Size, Share & Demand Report By Product Type (Suitcases, Travel Bags, Business & Executive Bags, Specialty Luxury Travel Goods), By Material Type (Leather-Based Luggage, Premium Synthetic Materials, Hybrid Materials, Metal-Based Luggage), By Distribution Channel (Direct Retail, Online Channels, Department & Specialty Stores, Duty-Free & Travel Retail), By End-User (Individual Consumers, Corporate Buyers, Institutional Buyers), By Region & Segment Forecasts, 2026–2031