Julbo Dolgan Spectron Outdoor Sunglasses A versatile, lightweight mountaineering sunglass, the Dolgan integrates high quality protection & current style. Features removable side shields & two lens choices. * Lenses: available with the Spectron X4 lens, offering 100% UV protection. * Protection: removable side shields *HCD Concept: highwrap lens geometry for an extra-wide field of vision.