Evadict Decathlon Unisex 10L Trail Running Bag with 1L Water Bladder is designed by and for trail running fans, this 10-litre bag will carry all your things on runs of up to 80 km. There are 5 pockets at the front of this 10-litre trail running bag: 2 pockets for 500 ml soft flasks (not included), a patented, waterproof phone pocket, as well as 2 pockets for your gels or cereal bars. In addition, we added 2 side pockets and 4 rear pockets to the bag: 1 kangaroo pocket, but also a large compartment with side zip which contains its own zipped pocket, as well as a large pocket designed for the one-litre water bladder (included). If you consider that we drink an average of 500 ml of water per hour of effort during running, and trail running specifically, and that this backpack can carry 2 litres of water, you can run for up to 4 hours. Therefore, with the one-litre back pocket and the two front pockets for holding 500 ml flasks, you can run stress-free between refuelling stops.