dr nfx2 (+ bonus lens) forestsig23 goggle. our most established goggle with a cylindrical lens, the nfx2 has all the bells and whistles: patented frameless design, swiftlock technology, armored venting, super anti-fog coating, bonus replacement lenses and more. additionally, the nfx2 utilizes our lumalens color optimized lenses bringing next level clarity, adaptability, and style to the dragon lineup.