When sourcing plastic luggage, material selection determines durability and price point. ABS (Acrylonitrile Butadiene Styrene) is the most cost-effective but prone to cracking under extreme pressure. PC (Polycarbonate) offers superior impact resistance and flexibility, often returning to its original shape after a dent. PP (Polypropylene) is the lightest option and highly resilient, making it ideal for premium lightweight collections. For B2B buyers, a PC+ABS composite is often the best balance of cost and durability.