Not gonna lie, I didn’t know “tropical wool” was a thing before I wrote this post. But, it turns out the stuff is super breathable, wrinkle resistant, and durable, which makes it perfect for lightweight layers like these Dayton Shirts from Engineered Garment. Made in the USA, the shirts have a short stand collar, flapped button closure, patch pockets, and a straight hem. Two tropical wools (and four other other equally warm-weather-friendly fabric types) are available at The Bureau.

For price and purchase info, visit The Bureau Belfast.