Marly Skin Guard™ is the only skin barrier foam that absorbs in the top layer of the skin, rather than drying on the skin where it can be washed or worn off. It is the only available solvent-free skin barrier foam, so it can be used on both healthy and unhealthy skin. Its pharmaceutical grade ingredients are non-greasy and form a barrier against allergens and toxins. Even with frequent washing and sanitizing, Marly lasts over 4-hours.