Tippmann Valor Paintball Mask Thermal Replacement Lens - Yellow Yellow, Dual Pane Lens Dual Pane Thermal Lens REDUCES GLARE - Glare occurs when the sun's rays hit the goggles at a specific angle, creating a blind area in vision. The curves of a spherical lens make it better equipped to handle glare. DECREASES DISTORTION - The spherical shape of your eyes allows the eye to better focus, enhancing your vision. In a similar manner, spherical lenses are better at preventing vision distortion while playing paintball. The Valor's Quick Release Lens System makes replacing and cleaning easy.