The holster has a dedicated 7.0L dry bag that is 100% waterproof and is secured with a Fidlockmagnetic buckle that's easy to adjust, even whilst wearing gloves. Nylon webbing, Hypalon straps and foam blocks secure the holster around the seat post, keeping the bag securely in place without sway.The holster is a hardshell construction with an X21 technical outer, and includes Hypalon MOLLE system for additional strapping whilst further Hypalon detailing aids durability and prevents scuffs and scratches. Reflective detailing on the dry bag adds visibility during night time riding.Capacity - 7LWeight - 250g(7L Dry Bag included)Key Features:100% WaterproofX21 OuterReflective DetailingHolster DesignFits Any Bike