The best pillows for side sleepers are feather pillows that fill the area between the crown of your shoulder and the side of your head. We call this are your 'comfort gap'. The broader your shoulders the wider your 'comfort gap' the thicker the pillow needed for your to be comfortable while sleeping on your side.
Yes, feather pillows can be great for side sleepers with neck pain, as long as they provide the right balance of support and cushioning. A pillow with a medium to high support helps keep your neck in proper alignment with your spine, which can alleviate pressure and reduce pain.
The best pillow for side sleepers is one that provides proper support for the neck and spine alignment. Feather pillows are a great option as they offer a soft yet supportive feel, molding to the shape of your head and neck.