Twenty 4 sunscreen is a broad-spectrum SPF 50 sunscreen with UVA, UVB, HEV, and HR-A protection that provide comprehensive protection against various types of ultraviolet radiation.
SPF 50: SPF (Sun Protection Factor) measures a sunscreen's ability to protect against UVB rays, which are the primary cause of sunburn and skin cancer. An SPF 50 sunscreen blocks about 98% of UVB rays.
UVA protection: UVA rays are longer-wavelength rays that penetrate deeper into the skin and can cause long-term skin damage, including premature aging and skin cancer.
UVB protection: UVB rays are shorter-wavelength rays that primarily cause sunburn and skin cancer. SPF 50 provides strong protection against UVB rays.
HEV protection: HEV (High Energy Visible) or blue light rays are emitted by electronic screens and can cause skin damage and aging.
HR-A protection: IR-A (InfraRed-A) protection is a newer concept in sunscreens, which provides protection against a wider spectrum of light beyond UVA, UVB, and HEV, such as Infrared-A radiation, which can also cause skin damage.