Many listings specify UV400 protection and state the lenses block 100% of UVA and UVB rays. Other listings use terms like “maximum UV protection” or “full UV400 protection.” Always confirm the exact UV rating on the product page.
Some listings are labeled extra‑large or oversized for larger heads, while many use “One Size Fits Most” or list a medium/one‑size fit. Sizing varies by product, so review listed dimensions or fit notes on each product page before buying.
Reported lens widths in the listings range roughly from 50 mm to 61 mm, and bridge widths span about 14 mm to 23 mm. Measurements vary by model—check each listing for precise sizing.
Smart glasses list a single (non‑universal) lithium‑ion battery with up to four hours of use per full charge, plus a charging case that can provide up to 32 hours of additional charge. Confirm charging specs on the product page.
Fit‑over sunglasses are described as wrap‑around, full‑coverage shields that slip over regular prescription lenses. Listings highlight polarized glare reduction, UV400 protection, and a pressure‑free fit designed for all‑day wear.
