Z Blok's unique formula contains no fragrances or inexpensive petroleum based ingredients. Z Blok does contain zinc oxide, which helps protect against skin cancer and premature skin aging without lip or skin irritation. Z Blok lip balm also provides broad-spectrum sun protection from both UVA and UVB rays. It is highly water-resistant so it stays on your lips instead of coming off in the water. Try Z Blok and see the difference that quality ingredients make in a lip balm. Z Blok Lip Balm. Features: 3-Pack of .15 oz. Lip Balms, goes on clear, 8% zinc oxide Fragrance free SPF 30 Broad Spectrum protection Helps to prevent skin cancer.