Making your own masks? These elastic cords are exactly what you need! At 6 inches long (that's 2 inches longer than standard cords), they're perfect for larger faces or masks with side channels. Made from soft nylon and spandex with silicone adjusters that won't irritate your skin. The 5mm width sits comfortably behind your ears without digging in, and the hollow core makes them lightweight and breathable. These won't fray or break during sewing or use - the high-density weaving keeps them intact through multiple washes. Best part? No cutting or threading cord locks needed - they come ready to use, saving you tons of time. Package includes 80 pieces in black and white, so you've got plenty for multiple mask projects. Just remember - don't iron these directly or expose them to temperatures above 250°F. Whether you're sewing by hand or using ultrasonic welding, these elastics make professional-quality masks at home.