Carson's new Large Eyewear Retainers for Larger Frames will help you get a “Gripz" on your expensive sunglasses and prescription eyewear. Gripz® eyewear retainers, by Carson, are engineered from high-grade braided silicone that will stand up to the elements and toughest use and abuse. In fact, they've been lab tested to hold the weight of a brick, earning the seal of “Brick Tested Tough." So whether you're biking, fishing, rafting or participating in any other vigorous outdoor activity, the patented Gripz® retainers will keep your valuable glasses safe.