I didn't know, for instance, that polar bears have black skin, the better to retain heat.
Moisturizers help the skin retain water, making it look plumper.
These products help your skin retain moisture so it resists drying and abrasion.
However, the olm's skin retains the ability to produce melanin.
Older skin retains less fat, making it look less supple.
Light weekly exfoliation using a loofah will also help skin retain moisture.
If you drain and cool quickly under cold running water, the skin will retain a nice tender texture.
Their role is to help the skin retain moisture, so it stays hydrated and healthy.
If your skin did not repel water on the outside and retain it on the inside, think what would happen!
Your skin will absorb water and still retain its natural oils.