Best Serum For Dry Skin: First Aid Beauty Ultra Repair Hydrating Serum The lightweight First Aid Beauty Ultra Repair Hydrating Serum ($38) will leave dry skin feeling supple and healthy with its use of hydrating hyaluronic acid, calming aloe leaf juice and colloidal oatmeal, and firming collagen. Image Source: sephora.com First Aid Beauty Ultra Repair Hydrating Serum $38 from sephora.com Buy Now