This is a Simms backpack and chest pack. I'm not sure of the exact capacity of the backpack, but I think it's around 10-13 liters. The chest pack cannot be used alone because it doesn't have a neck strap. Please use it in conjunction with the backpack. Both the backpack and chest pack show signs of wear, such as fading, but I think they are still usable. Please check each image for details on the condition. If you are interested, please consider purchasing.