Abstract: A SCBA with an air storage, a face piece with inner mask (nose cup), breathing regulator(s), a breathing valve, an exhalation valve operating at positive pressure relative to the ambient and a reservoir capable of storing the first part of an exhalation and delivering that part at the subsequent inhalation. The reservoir is positioned in the SCBA's face piece or in close proximity thereto, is in fluid contact with the inner mask, and has a shut-off valve controlled by a carbon-dioxide sensor. The operating pressure of the reservoir is maintained above ambient pressure and the operating pressure of the reservoir is between the opening pressure of the SCBA's breathing valve and the SCBA's exhalation valve.

Abstract: A cooling garment comprises a phase change material and at least one of: at least one leg portion and at least one arm portion. The phase change material may have a transition temperature between solid and liquid phases of between about 60° F. to about 90° F. The at least one arm portion has the phase change material disposed therein, and the at least one leg portion has the phase change material disposed therein. The arm and leg portions may be attached to a torso portion and shorts portion, respectively, and may be removable therefrom. The cooling garment may include a sensor configured to indicate a cooling capacity of the phase change material. A portable container having a reactivation substance stored therein may be provided to reactivate the phase change material. In one embodiment, the portable container is part of a self-contained breathing apparatus. In another embodiment, the phase change material is submerged in the reactivation substance in the container.

Abstract: A cooling garment comprises a phase change material and at least one of: at least one leg portion and at least one arm portion. The phase change material may have a transition temperature between solid and liquid phases of between about 60° F. to about 90° F. The at least one arm portion has the phase change material disposed therein, and the at least one leg portion has the phase change material disposed therein. The arm and leg portions may be attached to a torso portion and shorts portion, respectively, and may be removable therefrom. The cooling garment may include a sensor configured to indicate a cooling capacity of the phase change material. A portable container having a reactivation substance stored therein may be provided to reactivate the phase change material. In one embodiment, the portable container is part of a self-contained breathing apparatus. In another embodiment, the phase change material is submerged in the reactivation substance in the container.