Come and see our amazing products. Use the strap can help avoid lossing glasses. It's made of soft neoprene material and can match various glasses frames. When you are riding, cycling, swimming or other activies, it's no need to worry about sliding down and it will keep eyewear safe. You can also wear it aroud your neck when it's no eed. Logos can also be put on the surface. Pls confirm with us about the packing info, stock color and exact production time before placing your order.