Defcon 5 Hydro Compatibile Tactical Backpack 40 Liters Tan D5-L116 CT. It has two opening holes on the top that allow the exit of radio antennas and individual hydration systems. Specifications for Defcon 5 Hydro Compatibile Tactical Backpack 40 Liters: Manufacturer: Defcon 5 Gender: Unisex Age Group: Adults Pack Volume: 40 liters Pack Application: Tactical Hydration Bladder Capacity: Yes Size: One Size Weight: 1.1 kg Features of Defcon 5 Hydro Compatibile Tactical Backpack 40 Liters Weight: 1.10 Kg Dimensions: 25 cm x 38 cm x 52 cm Water Repellent MOLLE system Compatible with hydro systems Package Contents: Defcon 5 Hydro Compatibile Tactical Backpack 40 Liters Defcon 5 D5-L116 CT: Hydro Compatibile Tactical Backpack 40 Liters Tan