Chalkers 28 L Large Backpack for Men DC has always been inspired by tactical fear, and the Chalkers Backpack delivers performance-focused utility for your day-to-day commute and beyond. Featuring external straps for your hardware, a roomy interior with an interior organizer for grab-and-go access, and a padded sleeve for your laptop or tablet. Offering solid comfort and protection via mesh padding, all around dependable functionality, and plenty of space with a 28 liter volume.