The dermis layer, or true skin, is one of three integrated skin layers. It is between the epidermis and subcutis. It is thick, sturdy, and rich in nerves and blood vessels and in sweat glands. It is thickest on the palms of the hands and feet, where friction is needed for gripping, and it is thinnest on the eyelids, which must be light and flexible. It shields and repairs injured tissue. This layermycontentbreak consists mostly of collagen, which originates from cells called fibroblasts and is one of the strongest proteins found in nature. It gives skin durability and resilience. The subcutis, the third skin layer, joins to the bottom of the dermis.