The shade parasol says its UPF50. What does that mean? Is it the same as SPF?

The phil&teds shade stick stroller umbrella or MB parasol stroller umbrella offer premier UV and heat protection and are rated at a top-notch UPF50. That scale is different to SPF (as that generally only refers to sun creams) and measures for both UVA and UVB transmission.

UPF 50 equals a massive 99% of UV rays blocked for worry-free sunny day strolling.