Field Optics Eyeshield Standard Binocular Winged Eyecups 36-44mm ( one pair )

A must have for everyone who uses binoculars Dramatically improves the performance of even the finest optics by blocking out all ambient light Patented universal design easily attaches to all binoculars & most spotting scopes Durable yet soft & flexible rubber comfortably conforms to the side of the face, enveloping the eyes in total darkness Also blocks out wind, dust, rain, snow & peripheral distractions When not needed, simply flip down into the stowed position, where they will not interfere with covers or cases Lifetime guarantee Fits all major brands of binoculars
Standard: for eyecups approx 36mm to 44mm