Patented product! This breathable nose pads are well-made of medical materials—TPU from Germany. High quality of madical materials will effectively skin from being non-allergenic. TPU has shape-memory polymer which allows to bend 360°and restore initial shape without damaging. Unique design reduce the pressure onto skin of nose and make the nose naturally breathe. It is anti-slip which is able to firmly fix the glass on the nose. Easy to fix and clean it by yourself. There are 3 different shapes for your choice.