Sun Essential - Sun SerumA water-resistant moisturizing serum sunscreen that is suitable for all skin types and helps protect the skin from the harmful effects of UVA-UVB and visible rays. Purpose of Use: In addition to providing broad spectrum protection, it also provides cell-based sun protection. How to use: 30 minutes before sun exposure. It is first applied to the skin and it is recommended to renew it every two hours. It is recommended to re-apply every 2 hours during the day.