And why would these customers not be satisfied and happy? This product works! The Bear filter utilizes a multi-layered filtration process consisting of activated carbon filter media , a pre-filtration layer, and a post-filtration layer that effectively removes chlorine, heavy metals, sediments and other harmful contaminants in tap water.Its multi-layer filtration process works so effectively in removing more than98% of chlorine content in water and over 90% of turbidity. And it does all these while keeping the beneficial minerals like calcium, magnesium, and potassium; leaving you with only clean, fresh, and healthy drinking water. In fact almost all users noticed a big difference in their drinking water after using this filter.