Granite Gear Campus Buffalo Backpack Polyester Imported Repel weave fabric with taurpalite bottom for maximum protection against elements. Ergonomic maxload multi-compartment design. tricot lined pocket for valuables. High density foam shoulder harness. Breathable load absorbing shoulder harness, load stabilizing sternum strap, hide-away load stabilizing waist belt, ergonomic raised foam back panel with lumbar support. Gear tech computer sleeve fits most 17" laptops, multi pocket organizer. Repelaweave Fabric with Taurpalite Bottom for Maximum Protection Against Elements Ergonomic MaxLoad Multi-Compartment Design Barrier Zipper Tricot Lined Pocket for Valuables Breathable Load Absorbing Shoulder Harness Load Stabilizing Sternum Strap Hide-Away Load Stabilizing Waist Belt Ergonomic Raised Foam Back with Lumbar Support Adjustable Compression Straps Dedicated Gear Tech Computer Pocket fits most 17 Laptops Dual Stretch Mesh Hydration Pockets Multi Pocket Organizer 18.5x12x9.25 1950 Cubic Inches | 32 Liters