The Caribbean Consists Of Hardened Metal Frames & Acetate Tips. That Comes In A Bamboo Case With A Microfibre Cloth.All Baus Headwear Sunglasses Are Rated In Category 3  From Table 1. Classifications Of Sunglasses And Fashion In The Australian/New Zealand Standard AS/NZS 1067:2003. Our Lenses Are "Carl Zeiss" CR39 With UV400 Protection. Protection For Your Eyes From Both UVA And UVB Radiation Comes As A Standard With Baus Headwear.