High Sierra Classic Series 59201 Summit 45 Internal Frame Pack 45 liter top load main compartment with gusseted drawstring closure and adjustable top lid Front load sleeping bag compartment with divider Padded backpack straps, with adjustable load-lifters, is constructed with VAPEL mesh AIRFLOW. Single, contoured aluminum frame bar can be adjusted to fit the shape of your back. 27x14x7.5 inches (68.6x35.5x19cm) 2750 cubic inches 45 liters