Arbpro bags are strong, durable, and stiff enough to stand up on their own. The Black 50L is unique with additional zippered storage at the top for safety glasses, gloves or other smaller equipment that you need for easy and quick access. Large exterior compartment with multiple additional exterior storage compartments. Daisy Chains, D-Rings and sleeve pockets for all of your climbing gear. It has multiple carry handles, padded backpack straps and a padded back panel to assist with comfort on those long walks back to your job site.