Look for 100% UV protection (UV400), consider polarized lenses to cut glare, and choose a frame that fits your face and feels comfortable all day. Also think about lens material and color for durability and everyday use.

Key factors are UV protection, lens technology (polarized or not, tint category), frame size and shape, materials/weight, and the warranty or return policy.

Choose polarization for driving or bright outdoor use; opt for durable or lightweight frames for active wear; pick colors and shapes that match your style, and check whether you need prescription compatibility.

Compare how each style fits your face, the available lens options, and whether it’s compatible with prescription lenses. Check the warranty and return policy, and consider value after the discount.