FRAME FEATURES: The Emy RB3741 sunglasses feature a rectangular frame, gunmetal with bio-nylon pink lenses. SUSTAINABILITY: Bio-Nylon lenses are made with 40% bio-based materials derived from renewable sources such as castor oil. 100% UV PROTECTION: To protect your eyes from harmful UV rays, these Ray-Ban sunglasses include lenses coated with 100% UV protection.