One of the most popular types of cleansers, foaming cleansers are characterized by their abundant lather. They are also usually favored by those with combination to oily skin types because of the residue-free, squeaky-clean feel they leave behind on the skin.
The downside to foaming cleansers it that sometimes they can perform their job too well and end up stripping the skin of essential protective lipids and oils. This is because the cleansing agents needed to produce the airy, bubbly foams tend to be the most drying. One of the solutions manufacturers have come up with is to create a dispenser that turns the cleanser into foam as you pump. This helps reduce the amount of detergents necessary to produce lather and results in a more mild cleanser.