28 Litre Assault Pack - British Terrain Pattern

28 litre capacity
Padded back system
Waist belt with Fastex buckle closure 
Zipped compartment for a hydration bladder 
Three hydration / radio aerial ports 
Main compartment that has a wrap around zip allowing you to open it fully
2 smaller zipped compartments
MOLLE strips on the side and front allowing attaching additional bits of kit  
Smaller zipped pocket behind the large one 
Tensioner straps on the side for both keeping your bag tight and attaching additional items of kit.
How do they do it for the price ????