Page "Reactive armour" Paragraph 18

Since the inner liner is not explosive itself, the bulging is less energetic than on explosive reactive armour, and thus offers less protection than a similarly-sized ERA.

However, NERA and NxRA are lighter and completely safe to handle ( and safe for nearby infantry ), can theoretically be placed on any part of the vehicle, and can be packaged in multiple spaced-out layers if necessary.

A key advantage of this kind of reactive armour is that it cannot be defeated via tandem warhead shaped charges, which employ a small forward warhead to detonate ERA before the main warhead fires.