She continues by suggesting you make sure you're covered, literally, "a T-shirt* has an SPF of 8, so it's better than nothing.

A hat prevents damage to hair, especially color treated hair

Select a breathable hat of Dry-Fit fabric."


*The SPF of t-shirts depends on the weave of the cotton and the color of the shirt. Unless your t-shirt is specifically designed to protect you from the sun, you should assume it provides an SPF of less than 10, if that.