Dragon has one-upped their popular and technology packed NFX goggle and created the NFX2 which remains the same but now has Swiftlock.
Swapping out lenses literally does not get any easier than this folks. Levers on each side of the frame allow the skier to remove and replace lenses in seconds no more fumbling with your goggles in the parking lot.
This is a cylindrical lens goggle and with Dragon's Uni-Directional venting and stronger Super Anti-Fog coating you'll have a hard time fogging it up because that's the last thing anyone wants.
The NFX2 Knightrider comes with 3 lenses total which will help you get the most out of this highly versatile goggle.