What is the difference between Category 3 and Category 4 sunglasses?

Category 3 — dark lenses for bright days (the most common category) ... Only sunglasses with a filter category of 0-3 are considered safe for driving. Nike Vision sets the standard for sports sunglasses. Learn more about our athletic sunglasses for men & women who live an active lifestyle ... Nike Radeon 3 Lb. 3 ... Get a head start with Horizon, our Category 3 speed glasses designed for performance. Sharpened design, maximum vision, UV protection: ... Sunglasses (44) Sunglasses (44 products). Sunglasses (44) Sunglasses (44 ... CAT 3 (25) CAT 3 (25 products). CAT 0-2 (2) CAT 0-2 (2 products); CAT 1 (2) ... Frame material: acetate; Frame color: black; Lens filter category 3; Lens color: black; Made in Spain; Includes: cleaning cloth, case ... Lightweight but super strong TR90 frame. Impact resistant & shatterproof polycarbonate lenses. Full wrap fit to keep out wind, glare & UVR. ADULT HIKING SUNGLASSES MH100 CATEGORY 3 ... Our optical engineers developed these sunglasses for hiking. Ideal for occasional use in the mountains thanks to ... Bike sunglasses EKOI Persoevo4 EKOI White Revo Red Cat 3 to discover in the online EKOI boutique. You will also find our complete EKOI collection. Designed to shield your eyes from harmful UV rays and minimise glare, they ensure clear and comfortable vision on your adventures. These dark lenses provide a lot of sun reduction and a good level of UV protection. While Category 3 lenses are ideal for outdoor sun protection, be sure to use ...