Made of plastic, otherwise known as cellulose acetate, or zyl, the eyewear frame can be easily adjusted for a perfect fit with your prescription lenses. Your Philipp Plein purchase includes free standard shipping charges, and manufacturer packaging. You can add doctor verified prescription lenses, add custom polarized lenses, and many other lens options if you desire them. Like all Philipp Plein products, these eyeglasses frames provide the sophisticated and classic look that we all need.