<strong>4 Size / Capacity Options</strong>. <strong>Capacity:</strong> 20 Liters / 1,220 Cu.In.. <strong>20 Liter:</strong> Height : 28.5" | Diameter: 9.5"</br></br>. <strong>Capacity:</strong> 40 Liters / 2,440 Cu.In.. <strong>40 Liter:</strong> Height : 34" | Diameter: 11"</br></br>. <strong>Capacity:</strong> 60 Liters / 3,661 Cu.In.. <strong>60 Liter:</strong> Height : 39" | Diameter: 12.5"</br></br>. <strong>Capacity:</strong> 90 Liters / 5,492 Cu.In.. <strong>90 Liter:</strong> Height : 45" | Diameter: 13.25"</br></br>. <strong>Material:</strong> 500 D Waterproof PVC. <strong>Closure Type:</strong> Roll top with webbing. Welded waterproof seams. D-Ring for easy attachment. One removable shoulder strap