Terra nova elite 550 sleeping bag description the elite range of sleeping bags uses 600 fill power duck down to provide superlight performance at affordable prices the elite 600 bag is ideal for 3 season backpacking trips where weight and pack size need to be minimised to keep out the draughts the sleeping bag has been fitted with locking zip sliders to keep the zip in place and prevent it from creeping open during the night shoulder baffles the 3d hood and drawcord closure provide ext