Unisex Nylon Eyeglasses / Sunglasses Strap. Measuring approximately 25 inches long, this nylon and cotton blend cord is strong and durable. Made for active lifestyles for youth and adults alike and has adjustable stretch ends to fit most eyeglasses / sunglasses. Available in six color combinations: navy and black; royal blue and black; white and black (this one is a great gift for referees and other whistleblowers); red and black; purple and black; and green and black.