The Dr. Mary Side Sleeper pillow is designed to ease neck and shoulder pain for the dedicated side sleeper by keeping your head in line with your spine throughout the night. Rest your head on one end and hold the body in front of you with your arm placed on the arm of the pillow for ultimate comfort. The Pillow Bar's Down Alternative fill contains a blend of combed polyester fiber designed to mimic the luxurious density and loft of naturally-sourced down. Includes a complimentary removable 300 thread count washable cotton sateen zippered pillow protector with custom embroidery of your choice. Each pillow is hand made for you in Texas, USA. Petite/Small recommended for those 5'5" and under Medium/Large size is recommended for those 5'6" to 6' tall Athlete is recommended for those above 6' tall