What are the ethical considerations in the manufacturing of sunglasses?

Category. Heritage (4)‎. Lifestyle (14)‎. Mountain (16)‎. Performance (11)‎. Youth ... 3 Lens #color_Copper / Natural leather with Spectron 3 Polarized Lens ... Oct 27, 2020 ... Some websites say category 4 lenses are necessary for ski mountaineering, and some say category 3 are good enough. Provides significant glare reduction. Most common choice for regular outdoor activities in sunny conditions. Category 4 (3% to 8% VLT): Very dark lenses. For ... Design benefits · sun protection. Category 3 lens - 100% UV filter: perfect for sunny weather. · lightweight. Only 26 g. · stability. Rubber on the temple tips: ... Adults Category 3 Hiking Sunglasses MH140 ... Anti-UV lenses block out 100% of the sun's harmful rays and Category 3 protects you from glare. Thanks to their low ... Just 21 g. Robustness. Polycarbonate glasses made from high resistance plastic. 2-year guarantee. Coverage. Wraparound shape: protects your eyes from wind, ... Category 3 sunglasses are ideal for medium to bright sunlight. They are perfect for the beach, driving on sunny days, or any daytime outdoor activity. With a ... Does Category 3 Mean Polarised Lenses? No. Lens categories, including Category 3, are assigned based on the level of visible light that is transmitted through ... Our optical engineers developed these sunglasses for hiking. Ideal for occasional use in the mountains thanks to their lightness. Size: 54cm Net Weight: 50g Lens Category: 3 Lens Transmittance: 16.29%. Shipping & Returns. Free Express Shipping Times vary based on shipping destination ...