Chums Running

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very useful, prevents you from forgetting where you put your glasses and stops the glasses from slipping down your nose.

Works well on Maui Jim's prescription sun glasses, cotton is comfortable in hot and cold weather. The elastic ends hold well over time. I usually get new ones because of some color fading over a year of everyday use. I work outdoors a lot.

I bought this as I knocked my glasses while bellringing (yes, seriously) and I lost control because they were skewwhiff and I couldn't see properly. Not a good idea. The retainer is comfortable and the ends slid onto my glasses easily but with a firm grip. Adjustment is easy, even when worn, which is handy as I tighten the retainer up while ringing and then loosen it in-between spells to give the bridge of my nose a rest, all without taking my glasses off.

Incredibly comfortable. Works! Kept my glasses in place while doing a track day in a race car.