The Plasma offers all the basic essentials needed from a goggle. The clear lens has no tint to increase contrast when the light is flat or offer additional protection from the sun. However, they are a great choice for those looking for a goggle for night time skiing or mountaineering.Lens: ClearVLT: 86% (CAT 0)Size: Medium/LargeLens Shape: CylindricalLensClear – With an 86% VLT and no tint this lens is made for night time use.Visual Light Transmission (VLT) refers to the amount of light that penetrates a lens. A low percentage means less light passes through and a higher percentage lets an increased amount of light through. A lens with a lower VLT rating is better for bright conditions, where as one with a higher VLT is more suited for overcast and snowy days.