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

The Mountain Buggy parasol stroller umbrella offers 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.