Built with PVC-free, 300D nylon with double urethane coating ... blueVolume 20-40LFunction Waterproof Built with PVC-free, 500D nylon with double urethane coating, the new ... and characteristic of soft and low temperature endurance with waterproof, moisture proof, dustproof, stain proof ... PVC (transparent or semi-transparent)2) PVC-Free: Eco-friendlier urethane reduces environmental impact.3) Lightweight ...