Naya Glow Shield Me SPF 50+ Barrier Sun Fluid 50ml. - The most effective sunscreen is the sunscreen you will actually wear. The high UVA protection shields you from premature ageing through the UVA rays. A safe sunscreen and skincare in one. This luxurious SPF is so silky soft, you'll actually love to wear it. NAYA's Sun Fluid has a UVA factor of almost 30. The UVA protection is almost twice as high as prescribed for the UVA seal.