Classic lightweight readers offer long-wearing comfort and classic style. Spring hinges provide an easy on/off, secure fit. Made of lightly flexible TR 90 nylon. Reading glasses are available in the following magnification: +1.50, +2.00, +2.50, +3.00, +4.00 or +5.00. <ul> <li>Made of lightly flexible TR 90 nylon</li> <li>Available in magnifications from +1.50 to +5.00</li> <li>Spring hinges provide an secure fit</li> </ul>