Ray-Ban Mens Liteforce Sunglasses (RB4179) Plastic,Carbon Fiber,Peek Composite Imported Case included Lenses are prescription ready (rx-able) Ray-Ban Liteforce Tech RB4179 sunglasses are a perfect combination of iconic design and innovation. A new bio-material made of a semi-crystalline thermoplastic You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!