With stain protect protects against future stains. Our best cleaning formula (based on average room size of 180 sq. ft). Stain protection odor removal professional results. Advanced clean & protect. Professional strength formula. Cleans 1200 sq. ft or 6 rooms (based on average room size of 180 sq. ft). Our best cleaning formula (compared to other Bissell rental machine formulas). Help keep your carpet looking newer longer by providing unbeatable cleaning power and protect carpet from future stains. Contains no heavy metals, phosphates or dyes. Biodegradable detergents. Earth friendly formula.