Stable Optical Frame
1. The optical frames are made of non-toxic materials approved by the FDA.
(These are safe materials used in medical products inserted in the body and in baby products, such as quality feeding bottles.)
2. The frames are flexible, display excellent elasticity and do not break easily. On the rare occasion that breakages may occur, they will not produce sharp fragments which might cause injury.

Comfortable Optical Frame
1. The frames are incredibly light: only 6 to 9g in weight.
2. There is a cushion on the tip that matches the complex curves of the ears and does not press on the ears.
3. The frames are shaped to follow the face, so they are comfortable to wear and do not press on the temples.

Non-slip Optical Frame
1. The nose bridge matches the curves of the nose well and thus, allows the nose to hold the glasses comfortably in place and prevents them from slipping down.
2. The glasses sit comfortably and do not slip down because the curves of the ear tips match the curves of the ears.
3. The glasses do not slip off as each ear tip can be easily adjusted and secured to create a good fit.