What type of pillow is best for side sleepers?

Across high-trust testers (Good Housekeeping, Sleep Foundation, Reviewed), side sleepers consistently do best with a medium-to-firm pillow with a higher loft — typically 4 to 6 inches — to keep the head aligned with the spine. Adjustable shredded memory foam pillows like the DreamyBlue and contoured cervical pillows like the Cushion Lab Deep Sleep score well because loft can be tuned to shoulder width.