Help keep your lenses clear with Nerdwax FogBlock, a reusable microfiber cloth with an anti-fog coating.

How to use: Breathe onto your lenses, then wipe them evenly with the cloth. Store the cloth in its pouch between uses.

According to Nerdwax, the cloth remains effective for up to one year or 300 applications when stored in its pouch. Suitable for lenses with anti-reflective coatings; performance may be reduced on some Crizal lenses.