The camlebak mule 3l with antidote quick link reservoir is an iconic camelbak bag and is the perfect balance between a cargo bag and a hydration pack the bag is rammed full of features that make the mule the bag that it is the back pack has around 9 litres of capacity and then an extra 3 litres of space is for the antidote 3 litre reservoir the bag has the comfortable and padded vx 3d mesh back panel and also a lightweight waist strap which keeps the bag tight to your bike so everything