Rash guards for pool swimming -- Need Recommendations

I recently joined a Masters team that swims outside at noon here in sunny Tucson, AZ.

I would like to find a comfortable rashguard/swim shirt to avoid getting so much sun. I lather up with sunscreen now but it’s not enough.

Any recommendations?

I use my Dakine rashy when in Hawai’i.

Nothing special. About $50 at any surf shop.

Underarmour heatgear top (long sleeve). It’s upf50, thin and skintight.