Made from recycled-nylon cord, this reflective strap fixes to your sunglasses so you can wear them around your neck on drawn-out days in the sun. The looped silicone ends safely grip your frames, while the leather keeper can be used to adjust the length. Recycled nylon (polyamide) reduces our demand on limited natural resources and reduces greenhouse gas emissions Shell: 65% Recycled polyamide (Recycled nylon), 25% Post-consumer recycled brass, 5% Leather, 5% Silicone. Excluding trims COS Men's Reflective Sunglasses Strap in Black