Ahead of the style curve, for once...

Esquire has an article by Christine Flammia about Hawai'ian shirts:

The tropical shirt is a summer staple, often detailed with brightly colored palm trees and hibiscus flowers. While many drunk uncles and ill-dressed tourists wear similar prints without much sartorial whimsy, don't let their cargo shorts and water shoes scare you; they're one of the coolest shirts you can wear this summer.
Look for fresh prints and lightweight fabrics to make it feel modern. Balance the bold look by keeping the rest of your outfit tame (think chino shorts and espadrilles). Here are twelve of the coolest ones for this summer. See the article for more selection and pricing.

Rico says he's been wearing them for decades, and does so every time it turns warm.