Zack Brand: Black Diamond Product Name: RPM Size: Although it's listed as 26 liters, it actually has a storage capacity of around 30 liters. This is an early model, so it's one size. Condition: Unused (without tags) Description: A deadstock item of a famous product. It's a simple and easy-to-use backpack. I think it can handle a 1-night, 2-day hike if you have UL (Ultra-Light) equipment. Type... Hiking wear/Outdoor wear Type... Backpack/Bag Type... Backpack/Zack Size... 11-25 L Size... 30-45L