What is a neck pillow? Rebecca Leonard April 09, 2019 11:06 Updated Follow A neck pillow is a memory foam collar designed especially for travel. Wear it to support your neck as you sleep upright. Perfect for long flights, coach, train and car journeys. Shop all our pillows. Related articles What pillow firmness should you get for side sleepers? What is the ideal depth of pillow for a back sleeper? What is the ideal depth of pillow for a side sleeper? What pillow firmness should you get for Arthritis? What is a Mini Travel pillow? Comments 0 comments Please sign in to leave a comment.