1These glasses are very strong and protective. They are specially designed for hard-working men and women, and they are easy to carry. 2Even if you are working in challenging indoor conditions, this versatile glasses can maintain comfort and you can use it with confidence. 3Regardless of the face shape or head size, the sides and nose can be adjusted to provide you with a perfect fit without slipping 4Protect your eyes from accidental chemical splashes, flying debris, spray, liquid or saliva drops. 5Perfect for work and play, perfect for woodworking, metal and construction work, laboratory and dental work, cycling, squash, or wherever you need to wear glasses.