The FogBlocker Eyeglass Anti-Fog Cloth is a patent-pending ultrafine microfiber cloth that can be safely wiped on any lenses, including coated ones. The 5.8 x 5.8-inch dry cloth can be used approximately 500 times, and the company says it provides fog-free eyewear for 24 hours per application. Anglers who wear a facemask/gaiter to avoid the sun’s harmful rays, and hunters who wear masks for warmth or camouflage, can use the dry cloth on their eyewear prior to heading into the field to ensure clear lenses. FogBlocker also works well for everyday use when a mask is worn with eyeglasses, keeping lenses fog-free even when the user walks into a warm environment after being in cold temperatures. MSRP: $15.25. Contact: www.fogblocker.com