The Janoymu Rofi is a flexible filter mask used by the Poku Saeruo Degonjo whose purpose is to filter out airborne hazards and render near-breathable air breathable.

The current two models of filter masks came into production in 754 CY (YE 35).

The Janoymu Rofi is worn to protect the Poku'vonai from airborne hazards. They come in two models. The integrated filters of both models are good for twelve hours of operation. When they have been used for that long, the filter panel turns a striking shade of blue. Filter masks are kept in a sealed bag until used, and used masks can be refurbished at appropriate Clan facilities.

Both models of mask have a connecting port where a portable oxygen bottle can be attached. Alternately, the masks can be connected to the Life Unit typically used with the Clan's Vacuum Suit.

The Model I Filter Mask is designed to cover the nose and the mouth. This protects the respiratory system. The Model I is pliable and can be carried in a small pouch worn on a belt. The Model I only has one strap which runs around the back of the head. Applying this mask is a swift affair which takes very little time.

The Model II Filter Mask is designed to protect the entire face. It requires far more time to safely apply than the Model I mask. The Model II comes with packages of sealing gel which must be smeared on its edges before it is warn. The wearer then puts the Mask on, strapping it down and pressing the gelled edges against their skull. The gel creates a modestly adhesive seal between the wearer's skin and fur and the mask. Removing the Model II is unpleasant, as it often means pulling out more than a few patches of fur, but this is preferred over the alternative of breathing in hazardous airborne particles.

• Article by Nashoba. Updates by Hollander.