Carson's revolutionary new eyewear retainers 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 patent-pending Gripz retainers uniquely combine friction and a contracting force to provide an extremely secure hold that will keep your valuable glasses safe. Only available in Black Ash, ER-30 (01). At Carson, we strive to make sure our customers are 100% satisfied with the quality of our products. We are so confident in our products that we back them with a One Year Limited Warranty! This Carson product is warranted to be free from defects in material and workmanship for a period of one year from date of purchase. Please contact Carson for additional warranty details.