Philipp Plein First Lady Hongkong Sunglasses #220
Philipp Plein First Lady Hongkong Sunglasses SPP039M 0869 #220
Frame Colour: Marble structure
Lens Colour: Smoke
Lens category: 3
Cat. 0 lenses
Are either clear or have a very light tint, they are used for safety glasses or spectacles where you need to see clearly what you are doing.
Cat. 1 lenses
Are for casual use, used as a comfort filter in cosmetic and fashion eye wear.
Suitable for: Fashion.
Cat. 2 lenses
Are the most common category to be found in sunglasses, for general use they provide good protection from visible light and from UV rays. This lens will have a tint which allows through less light than category 1 but more light than category 3.
Suitable for: General Purpose, watching and taking part in sport.
Cat. 3 lenses
Provide extra protection from both visible and UV light. These lenses will usually only allow less than 20% of visible light to penetrate the lens. This means that they will block out 80%+ of light.
Suitable for open mountain ranges.
Cat. 4 lenses
Provide a high level of protection from visible and UV light. These lenses are not to be worn when driving as they are too dark. These lenses will al low less than 10% of light to transmit through the lens. They are to be used for specific situations only – not for a pair of everyday sunglasses.
Suitable for: High altitude trekking and mountaineering.