Great lightly used condition- bought this for a weekend backpacking trip and haven’t used it since. I’m unsure on how many liters this is- I will try to update with more information. I’ll have to do some research on this being that I bought this a few years ago. Don’t be alarmed at the price but this is Patagonia and I paid a lot of money for this. There’s a lot of pockets and rooms for your gear- for a long backpacking trip. also- size S/M please refer to pictures of tags