Cross country bag running water bag backpack

There are three sizes of the backpack for your choice, with the different chest circumference:
S/M: 78-90cm / 30.71-35.43 inches(Small),

M/L: 88-100cm / 34.65-39.37 inches(Medium),

L/XL: 98-108cm / 38.58-42.52 inches(Large)

This backpack can be used for more than just running.
It is suitable for almost all outdoor activities such as hiking, riding, camping, marathon, etc.
- Capacity: 5L
- The maximum loading weight: 10kg
- Material: nylon and polyester