Dragon’s PXV uses a clean frame design and Panotech lens shape to offer an exceptional peripheral vision. Coming with 2 different lenses means you’re set for all weather conditions you are likely to encounter on the mountain.Lens: Lumalens Silver Ionized + Lumalens Flash BlueVLT: 16% (CAT 3) + 48% (CAT 1)Size: LargeLens Shape: PanotechMain LensLUMALeNS Silver Ionized – With a 16% VLT this lens is suited for bright light, sunny conditions. The lens has a hydrophobic hard coating to repel water and give added protection. An Ionized finish is used which makes colours richer whilst reducing glare.Bonus LensLUMALeNS Flash Blue – With a 48% VLT this lens is at its optimum in snowy and overcast conditions. The lens has a hydrophobic hard coating to repel water and give added protection.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.