It si made by Aluminum magnesium .It could keep cold in summer and Its quality is very great .lightweight polycarbonate frame you will forget you are wearing them In the middle of an adventure you cannot let heavy sunglasses weigh you down. All Qilan Sunglasses is backed by a lifetime warranty. It doesn't matter whether you come across an unforeseen obstacle, miscalculate a turn on a trail, or even if man's best friend decides to use your sunglasses as a chew toy. Whatever the reason, you can have Lifetime Breakage Warranty on Frame & Lens 100% satisfaction guaranteed. That's our promise. So, if you're not completely happy with your purchase within the first 30 days, just let us know. We'll do whatever it takes to make it right

• Great unique rimless design is the biggest advantage of this Sunglasses and Only we sell this polarized sunglasses ! When you wear this pair of sunglasses .You will become a fashion man
• We always walks at the forefront of the world of studying high-tech sunglasses frame and lenses materials. These sunglasses are made of our Newest Unbreakable and highly Stress-Resistant Material of Metal. It perfectly resolves the breaking issues that many sellers are constantly having to deal with. Most importantly, even with our newest technology the sunglass still continue to be both lightweight and durable for all-day comfort and protection
• Our Newest Polarized Lenses drastically reduce the brightness of shiny surfaces and helps restore the most no-glare real world to you. This helps greatly reduce eye fatigue and eyestrain and greatly enhances the safety of driving
• Great Clarity of Vision: Premium REVO colorful coating lenses provide a "natural vision" from transmitting original colors without any modifications Remarkable Eye Protection and Comfortable: 100% blocks UVA, UVB and harmful blue lights. Thoughtful and Ergonomic Design offers high comfort thanks to our exclusive smart technology
• This sunglasses fit for driving, travelling ,fishing, party, and most of the occasions.

Great unique rimless design is the biggest advantage of this Sunglasses and Only we sell this polarized sunglasses ! When you wear this pair of sunglasses .You will become a fashion man