How is Epidermis water resistant?

The epidermis is water-resistant primarily due to the presence of keratin, a fibrous protein that helps form a protective barrier. Additionally, the outermost layer, the stratum corneum, contains lipids that create a waterproof seal, preventing excessive water loss and blocking water from penetrating the skin. This combination of keratin and lipids ensures that the epidermis can effectively manage moisture levels, contributing to the skin's overall integrity and function.