These are portable folding sunglasses with super thin lenses. You can just fold them like folding cards and then put them into your pocket. It features a big square frame which can fit into your facial contour nicely and help modify your face. The lenses are very thin and they are within the same flat as the frame. Boasting UV400 protection, this folding sunglasses can protect your eyes from harmful UV rays. It can block both UVA and UVB radiation. This is because there is a reddish purple coating inside the lens. This can effective protect the skin around the eyes which is more sensitive.