The product using life is more than 3 years after 42356 times of elastic spring leg testing. Durable flexible spring hinges perfectly fit different face size.And the high elastic spring leg can prevent it clip your face.The nose pads of the glasses fit the bridge of the nose, effectively preventing the glasses from slipping and imprinting the skin.The nose pads and hinges are designed to make the glasses less likely to fall off when you are looking down or exercising.

Prescription safety glasses frames IMPACT RESISTANT LENSES: Protect your eyes from wind, debris, dust and nasty particles Forget about glasses coming loose!! They are unisex and suitable for both men and women..

Excellent peripheral vision and protection. Designed with your best interest at heart these safety glasses with protective goggles feature have an impact resis tant lens and frame, and carry a mechanical strenth Frating. No more wor ries about flimsy eyewear that might fall apart! The distortion free lenses will improve your vision, and promote superior viewing clarity！

optical frame can use for 3 years at least, and is difficult to break up. It fits right on the face which can adjust the width,preventing it clip your face and fall down. Its nose pad scan adjust to fully fit the bridge of your nose ,it has increased the applied force area,lightening your burden,reducing discomfort caused by prolonged wear and can not leave imprint .

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