Light tees are great for scorching days—they let air move and dry fast. But they have a downside. After a few washes, the collar might stretch, the hem can lose its shape, and you might find yourself adjusting it more than you'd like. It's not a quality issue—it's physics. Thin fabric simply has less structure.

The one-line takeaway: If you're always reaching for a fan, lightweight is your friend, but expect a shorter lifespan.