After reading the reviews on almost every "leash" on Costa sunglasses, I realized I didn't want the twist-lock closures making constant noise generate in my ears and get caught in my hair, grabbed my hat and hit me on the head so I decided to give this Costa loop halter a try. It arrived the day after I ordered it and I don't see any of the problems described with other fixatives. This one is really unobtrusive, not harsh and doesn't hit my neck or back, catch on anything or make noise in my ears. This bracket is ONLY for Costa models with a slot in the earcup at the rear end. You slide the loop portion of this latch through the slot in the earcup and thread the other end of the latch through this loop protruding from the earcup and pull tight. The cradle has a small plastic latch in the middle, and you slide that latch apart to separate the two built-in loops on the cradle to make "temporary holes" on the Costa or cut slits at the very end of the earcups on the earbuds. Glasses. I'm glad I bought it for the Costa Whitetip glasses. There isn't much and that's what I wanted.
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