Capacity: 3960 cu in / 65 L (including daypack) Weight: 9 lbs 11 oz / 4.4 kg Dimensions: 14 x 22 x 9 in / 36 x 56 x 23 cm * Modular Capacity: 1400 cu in / 23 L Modular Weight: 1 lbs 13 oz / 0.82 kg Modular Dimensions: 13 x 20 x 6 in / 32 x 49 x 20 cm * Detachable Modular Daypack * Coverts from backpack to wheeled solution * Main Bag: Zip-Away Connect Fit Adjustable Suspension: 17-21? adjustable torso length, comfortable dual density foam, padded hip belt to protect your back from wheels and transfer weight from shoulders to hips