The Calypso features a unique shape with the entire frame and arms made of Bamboo to create a lightweight, stylish look for any situation. Material Lens Bamboo Gradient Smoke UV400 Dimensions Width Height Length 137mm 51mm 140mm In Stock See it Features Expertly handcrafted bamboo half-frame and arms Extremely eco-friendly - bamboo is one of the fastest growing plants in the world UV400 rating providing 100% UV protection Double spring stainless steel hinges to maximise comfort Float in water - no more lost glasses in the sea! For Every SaleLearn more Happiness Guaranteed We hope you love these glasses as much as we do. However, if you are not happy with them in any way, you can return them in an unused condition within 30 days and we will issue a full refund or replacement pair, no questions asked!