Dr. Bronner's SAL SUDS is our hard-surface all-purpose cleaner. It is a balanced formulation of plant-based surfactants with natural spruce and fir-needle oils: it cleans and rinses with exceptional power, yet is mild and gentle on the skin. Sal Suds is equally effective in hard or soft water, rinsing freely, hot or cold. It is 100% cruelty-free: no animal testing. Sal Suds will biodegrade rapidly after it has done its job.