Final answer:
The dermis layer of the skin contains hair follicles, along with other structures like blood vessels and glands.
Step-by-step explanation:
The layer of the skin that contains hair follicles is the dermis.
Hair follicles are the structures where hairs originate, and they grow out of follicles located within the dermis. The dermis also contains other structures such as blood vessels, sweat glands, and sebaceous glands.
The dermis is the thicker layer beneath the outermost layer of the skin called the epidermis.