endless style and the best view . the spy marauder offers insane peripheral vision, with frameless style, maximum ventilation and spy's ultra-secure magnetic deadboltâ„¢ lens change system. it all adds up to a solid pair of snow goggles that will always keep you in control. spy adds a free premium bonus lens, making the marauder your newest partner in snow goggles for sure. happyâ„¢ lens techpatented happyâ„¢ lens tech enhances colour and contrast and is scientifically tuned to boost mood and alertness for an unparalleled viewing experience.lens hd+ lenses are designed to transmit a maximum of good rays while blocking bad rays. the good rays have been proven to boost our mood and alertness. in addition, the hd+ lens enhances colour and contrast, making bluebird days even bluer and bumps and cracks more visible.transmittance of visible light: 13 %