Dragon\'s top of the line RVX goggle has all their best technologies and innovations in a modern frame shape. They have incorporated their latest lens changing system, the Swiftlock 2.0, which is quick, easy and secure using a discrete lever built into the side of the frame to lock the lens in place. Optical glasses can be worn underneath as the frame is OTG (Over the Glasses) compatible. This colourway has been released to coincide with the Winter Olympics and will be worn by Dragon athletes. As an exclusive we will be supplying the goggle with a premium injected bonus lens, so you are set whatever the conditions.Lens: Lumalens Dark Smoke + Lumalens Violet VLT: 23% (CAT 2) + 62% (CAT 1)Size: Medium/LargeLens Shape: 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.Main LensLumalens Dark Smoke – With a 23% VLT this lens is suited to very bright light, sunny conditions. The lens has a hydrophobic hard coating to repel water and give added protection against scratching. Bonus LensLumalens Violet – With a 62% VLT this lens is at its optimum in snowy, heavily overcast, and darker conditions. The lens has a hydrophobic hard coating to repel water and give added protection against scratching.