The Costa Del Mar C-Mono Retainer Gripper is the perfect accessory for any outdoor adventure. This durable and lightweight retainer is designed to keep your sunglasses securely in place, so you can focus on the task at hand. Constructed from a flexible mono-filament, the retainer is soft against your skin and has an adjustable fit for a comfortable experience. With an anti-slip coating, you can rest assured that your sunglasses will stay put. Whether you're out fishing, running, or just soaking up the sun, the Costa Del Mar C-Mono Retainer Gripper will keep your sunglasses in place and make for a more enjoyable experience.