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