Just like the best-selling Tideline retainer. the Tideline Adjustable is sleek. durable. versatile. and any angler's best friend. Made from ultra-lightweight stainless steel cable complete with dual adjustable beads. you'll unlock the perfect fit every time. Plus. swapping between wire-frame glasses while tying flies to heavier polarized lenses while chasing fish has never been easier with small and large interchangeable silicone ends that won't stretch out or lose their shape. Proudly made in the USA. the Tideline Adjustable is a simple essential that upgrades any fishing trip.