Compacted, pillow-shaped briquettes of sodium chloride. Intended for use in regenerating ion-exchange resin in both household and commercial water softeners, and can be utilized effectively in all types of water softening units. Under normal use, it resists mushing, bridging and channeling to provide excellent percolation and brine formation. Virtually 100 percent water soluble.  Eliminates messy tank cleaning, providing efficient operation of the water-softening unit. Packaged in polyethylene bags for added moisture protection.