Merlin E-Shield Protective Shield The Merlin E-Shield has been designed to make mouth-to-mouth resuscitation safe for both patient and rescuer and features a highly effective 3M bacterial filter. The Merlin E-Shield is available in a poly bag or a keyring pouch for ease of access. Features Single-use mouth-to-mouth protection shieldPoly bag or keyring pouch (Pouch colour may vary)Highly effective 3M bacterial filter Picture is for illustration purposes only, pouch may have slight colour variation