Bino Bandit will improve visual acuity and reduce eye strain when using binoculars. Bino Bandit will fit all binoculars including the new Swarvoski BTX, and is made to be comfortable. To install the Bino Bandit, just stretch the flexible neoprene around each eye piece and tighten down.
I have winged eye cups for my 10x42 Swarovski EL's and love them. I purchased a different brand of binoculars for my girlfriend. Needless to say, Swarovski brand of winged eye cups do not fit other brands. So I searched the internet and couldn't find any other winged eye cup brands that I liked or would fit. Then I found the Bino Bandits. What a great product. These work perfectly and comfortably fit all brands of binoculars. I highly recommend the Bino Bandit for anybody who wants to improve their glassing experience by shutting out the peripheral sunlight. Especially for western hunters who spend a lot of time glassing on tripods.