For entry-level or disposable markets, PE (Polyethylene) is the standard due to its low cost and lightweight nature. For reusable and premium segments, prioritize EVA (Ethylene Vinyl Acetate) or PVC (Polyvinyl Chloride). EVA is increasingly preferred as it is eco-friendly, biodegradable, and odorless compared to PVC. Ensure the thickness is specified in millimeters (mm); 0.15mm to 0.30mm is the industry standard for durable, reusable raincoats, while 0.02mm to 0.05mm is typical for emergency disposable ponchos.