You are purchasing 2 pair of Epoch Sunglasses; one Epoch 1 with blue/gray frames and amber lenses and one Epoch 2 with black frames and polarized smoke lenses. Epoch 1 is a classic, sporty frame featuring co-injected inlaid rubber that provides a non-slip fit comfortable for all day wear. The inlaid rubber not only optimizes comfort, but also improves the overall strength of the frame. Lenses are shatterproof polycarbonate and block 100% of UVA & UVB rays. Amber lenses, also referred to as copper, brown or "HD", block blue light which helps to add depth perception. They are good for low-light conditions and block less sunlight than the smoke lens. Epoch 2 is a unisex frame and features the season's hottest colors.  The half-framed Epoch 2 features co-injected inlaid rubber in the arms, which provide comfort for extended wear and increase durability.  The lenses are shatterproof polycarbonate and block 100% of UV rays.  Smoke lenses are best for maintaining the true colors of what you're looking at. They block the most amount of light, which will help to reduce eyestrain if you'll be outside for an extended period of time. Epoch Eyewear is a Veteran owned and operated company. We are proud to be a part of the Veteran community and build a company that provides jobs and great products.