You will never lose your glasses. There is no chance to break. These are Thinoptics. These reading glasses could be a big help for people who lose or misplace their glasses. The thinoptics glasses bend to fit into a keychain. So you’ll always have them with you. Thinoptics readers don’t have any arms. They use gentle pressure to sit on the bridge of the nose. The company claims the readers fit over every single nose. The glasses weight as much as one nickel, but the company says they are virtually unbreakable. The frames are made of the same material. It often used in bulletproof eyewear. The nose bridge is made from NITINOL which is ten times more elastic than spring steel. Thinoptics come in four reader strengths and six different colors. The company also sells a version that attaches to the back of a phone.