Terra nova elite 350 sleeping bag description the elite range of sleeping bags uses 600 fill power duck down to provide superlight performance at affordable prices the elite 350 bag is ideal for spring and summer 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 nightthe 3d hood and drawcord closure provide extra warmth