Avid Benchmark Ultra Standard SystemThe Avid Carp Benchmark Ultra Systems give you next level bankside comfort. Using a combination of a high quality memory foam mattress, with the TLS lumbar design and firm base sheet offering reduced elasticity and less sagging. With Strong and reliable dual pivoting CNC hinges and uprated springs and improved track on the legs giving improved stability. Topped with a reversible 5 season dual layer duvet with a 20,000mm HH outer and draft baffles