Do you know how to choose the good quality sunglas

Summer is the world’s sunglasses, fashion, beauty, radiation protection, these features make it more like wearing sunglasses, but the experts say, cheap sunglasses wholesale choose sunglasses’s time to pay extra care not only concerned with style, but ignored their quality sunglasses.
Many famous people can be seen wearing the latest Christian Dior sunglasses. However with the advent of internet shopping, the prices of this luxury brand’s fantastic sunglasses are no longer out of the grasp of the everyday person. Through various shops all over the internet, you can easily navigate your way to a great price on Replica Dior sunglasses. There are even sites out there that specialize in providing prescription sunglasses at a deep discount when compared to traditional retailers.
and do you know how to choose the good quality sunglasses.as we know the quality is base on the materials.
Sunglasses lens materials are mainly two kinds of glass and resin materials, the choice of lenses that, when there are several factors: clarity, weight, durability and price.
1. Glass Excellent optical clarity, scratch-resistant ability, and hardness. Disadvantages: heavier, more expensive prices, poor impact resistance, and easy to crush or shatter.
2. NXT polyurethane excellent impact resistance,2010 NBA Champions Cup Jerseys, difficult to damage, high optical clarity, light and flexible. Disadvantages: expensive.
3.Polycarbonate good impact resistance, difficult to damage, optical transparency, light weight, small size, is the market mainstream. Disadvantages: relatively poor scratch resistance than the clarity of glass or NXT polyurethane slightly lower.
4. Acrylic low cost, low-cost alternative to polycarbonate, Gucci from China suitable for casual or occasional use of sunglasses. Disadvantages: optical transparency is slightly lower than the polycarbonate or glass.