UPF of Smart sunhood is 67.4 (which is equal to 98.5% of UV rays blocked).
Some detail on why this is very good:
Everyone knows that a sunscreen lotion with a Sun Protection Factor (SPF) of
15 or higher is an essential defense against potentially harmful ultraviolet
rays (UV). But did you know that certain fabric can also provide an
effective shield against UV when made from fabrics that meet or
Some swimwear manufacturers use the Ultraviolet Protection Factor (UPF) to
measure a fabric’s ability to reduce UV transmission. A loosely constructed
fabric allows more UV rays to pass through, earning a lower UPF rating
(e.g.UPF 20). Conversely, more tightly constructed fabrics increase UV
blocking efficiency and earn higher UPF ratings (e.g. UPF 50).