Michel Rouen UPF Golf Shirts

A UPF number describes how much ultraviolet a fabric lets through when it is dry and not stretched. The Skin Cancer Foundation puts the bands plainly: the Foundation calls 30 to 49 very good protection and 50+ excellent, and 50 is the floor for its own seal. Sixteen cuts on this site carry such a figure, most of them 30+ and part of the long sleeve shelf 50+, and they are gathered here because the number is the reason somebody looks for them rather than a detail they notice afterwards.

Two things reduce it and both are worth knowing before you spend money on the number. Cloth pulled tight over a shoulder opens its weave and lets more through, which is an argument for the cut being loose rather than close. And wet cloth protects less than dry: the Foundation's own example is a white T-shirt that rates about 7 dry and only 3 soaked. That is not a reason to distrust the figure. It is a reason to read it as what it is: a property of the fabric under standard conditions, not a promise about your afternoon.