Made as a glasses holder (sunglasses holder), but I think it can also be used as a necklace. The cord is black wax cord. I did a simple submersion test, and there was no color transfer. (Full submersion time: 3 minutes) The length is adjustable. You won't have to look for your glasses anymore (≧∀≦) *This is handmade. I make them carefully, but there may be some imperfections compared to mass-produced products. Please understand this, and consider purchasing if you like the design and concept☆ *Shipped via Yu-packet Post (anonymous delivery).