Any seat with a headrest: economy, premium economy, trains, buses and car passenger seats. Never use it while driving.
The Neck Pillow Was Never Enough
You've tried twisting it, flipping it, wedging it against the window. Your head still drops, and you still wake up.
Because sleep on a plane needs three things: darkness, a head that stays put, and arms that stop fidgeting.
One set. All three.
