Facial serums are lightweight, fast-absorbing liquids that are designed to penetrate deeply into the skin to deliver a high concentration of active ingredients. They are typically applied after cleansing and toning the skin, and before moisturizing. Here are some examples of facial serums and accessories that can be used with them:

1. Hyaluronic Acid Serum: Hyaluronic acid is a powerful moisturizing ingredient that helps to plump and hydrate the skin. Hyaluronic acid serums can be used on their own or mixed with other serums to enhance their moisturizing benefits.

2. Vitamin C Serum: Vitamin C is a potent antioxidant that helps to protect the skin from environmental stressors like pollution and UV rays. Vitamin C serums can help to brighten the skin and even out skin tone.

3. Retinol Serum: Retinol is a form of vitamin A that helps to stimulate cell turnover and collagen production, which can help to reduce the appearance of fine lines and wrinkles. Retinol serums should be used at night, as they can make the skin more sensitive to sunlight.

4. Facial Rollers: Facial rollers are accessories that can be used with serums to help improve the absorption of the product into the skin. They are typically made of jade or other cooling materials and are rolled across the skin to help reduce puffiness and improve circulation.

5. Gua Sha Tools: Gua sha is a traditional Chinese technique that involves using a flat tool to massage the skin. Gua sha tools can be used with serums to help improve the absorption of the product into the skin and to promote lymphatic drainage.

6. Face Masks: Face masks can be used to enhance the benefits of serums by delivering additional nourishing ingredients to the skin. Sheet masks are a popular option, as they allow for the ingredients to be absorbed deeply into the skin.

7. Oil Blotting Sheets: Oil blotting sheets can be used to remove excess oil from the skin without stripping away moisture or disrupting the serums that have been applied. They are especially useful for people with oily or combination skin.

Overall, facial serums and accessories can be used to customize your skincare routine and target specific skin concerns. It is important to choose products that are appropriate for your skin type and to patch test new products before incorporating them into your routine.