Optical plastic (TR13)
A robust, sturdy, cost-effective plastic composite that most glasses are made from. Reasonably lightweight and capable of being produced in an almost infinite variety of colours which makes it a material of choice for many glasses frames manufacturers.
Acetate composite
Cellulose acetate is a hypoallergenic, plant-based composite, known for being strong, lightweight, and flexible. It's made from natural cotton and wood fibres. While plastic-based materials are cheaper to produce, they are harmful to the environment whereas cellulose acetate is from renewable materials.
Nickel alloy metal
Most metal glasses are made from nickel alloy. Very versatile and lightweight. Strong, durable, keeps looking great for ages, easy to clean. Despite the price tag, metal glasses made by popular brands that cost hundreds of dollars are mostly made from nickel alloy.