This is a set of SALOMON hydration gear, including a 1.5-liter hydration reservoir and a 500ml soft flask. Hydration Reservoir: 1.5 liters Soft Flask: 500ml Used only twice, so it's in beautiful condition. However, it is a used item, so please take a close look at the photos and understand before purchasing. If you have any questions, please be sure to ask in the comments before purchasing. Please read the self-introduction before purchasing.