Replacement Lenses
A second lens is the cheapest way to make one goggle work in every condition, and far cheaper than a second goggle.
Most racers carry two: a low-light or flat-light lens for grey days, shadowed courses and snow, and a darker lens for bright spring conditions. Light changes between inspection and the second run more often than people plan for, and a course read in flat light with a dark lens is where gates get missed.
Lenses are frame-specific, so check the model before ordering — a POC lens will not fit a Sweet Protection frame, and even within a brand the generations differ.
See POC goggles, Sweet Protection goggles and all ski goggles. Check your goggle model before ordering, because lenses are not interchangeable between frames.