The frames of the Jupiter sunglasses are constructed with O-matter material, which is some kind of nylon, while the LX frames are made out of acetate, which is a type of plastic. The fact that the Jupiter glasses are so light makes them appear smaller in size.
It is a very comfortable pair of sunglasses, which are quite comfortable, especially when wearing sunglasses for an extended amount of time. A motion may make heavier sunglasses move out of place, especially during physical movement. The LX is made in Asia, but they follow the US model, such as the Jupiter.