Flexible sunglasses - and flexible glasses - use the same flexible material in the frame front, bridge, and temples as the regular flexible eyeglasses. Sunglasses with flexible frames are great for outdoor sports that are demanding on sunglasses. They are also great for active adults, and parents trying to protect their sunglasses from their kids! Flexible sunglasses frames are made with a variety of high-tech composite eyeglasses alloys that allow for extraordinary bendability. Although flexible prescription sunglasses frames aren't guaranteed to not break, they do withstand more abuse. Our favorite brands of flexible glasses are Flexon and Champion sunglasses. Flexon invented flexible sunglasses, and even patented the word Flexon. Flexon is our choice for the best flexible glasses frames, and all Flexon frames are available with prescription lenses. Flexible glasses are really flexible in the shaft of the temple, and the nosebridge. However, flexible eyeglasses are often designed with some non-flexible parts, to allow for fitting to your face. For example, the nosepad arms on flexible eye glasses are usually not made front he flexible material. Also, while the shaft of the temples are flexible, very often the tips of the temples are not made of flexible material. This is so that the tips of the temples can be adjusted to fit and stay around your ears.