(Shell) 100% Polyurethane; (Shell - Secondary) 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. Use with Stormtech Ice Pack.