Design Available: Baby Car Pink Bear Dream Bunny Elephant Marine Bear Unicorn Jurassic Alphabet Star Dimensions(+/-2cm): Small - 20*30*4cm Medium - 23*33*6cm Material: Polyester Wash Method: Hand Wash Suitable for (Eyebrow Standard Measurement): Small Size Head circumference size below 41cm (1 month after birth) Medium Size Head circumference size above 41cm (over 5 months) 3D AIR MESH TECHNOLOGY: Unlike other head shaping pillows, our pillows are scientifically made from 3D Air Mesh Technology. It effectively controls sweat and heat by circulating air through mesh fabric making the pillow extremely breathable and helps your baby sleepy comfortably. Air mesh is slightly firm providing the ultimate support to keep your baby’s head in perfect alignment. PRESSURE DISPERSION PILLOW: Our pillows are specifically designed with a pressure dispersion system and multi-layered structure that helps develop proper head shape and prevent flat head syndrome. COMFORTABLE SLEEP: Whether your baby is sleeping on their side or on their back, the ergonomic design of this pillow will retain the natural shape of your baby’s head. Air mesh technology gives your baby gentle and supportive positioning while sleeping comfortably. EASY TO CLEAN: To wash, start by removing the cover from the pillow. It is recommended to hand wash using warm water and mild detergent. For machine wash, use only gentle settings and warm water in order to maintain the shape and longevity of the 3D Air Mesh fabrics. Made in Korea