100% Polyurethane; Secondary Shell: 100% PVC; Lining: PVC and Polyester. Durable Reinforced Fabric, Large Main Zippered Opening, Padded and Ventilated Back Panel, Ergonomic Adjustable Shoulder and Sternum Strap, Dual Side Mesh Pockets, 3 External Storage Zippered Compartments, Heavy Duty Carry Handle, Food-Safe Lining, and Compatible with Ice Pack