ALVABABY toddler travel pillow covers are made of cotton.Pillowcases are breathable,gentle,lightweight and safe for kid\'s sensitive skin.pillow covers are softness for touching.Perfect Size -pillowcase fits 13x18 inches pillows,also loose fits 12x16 inches toddler pillows, travel pillows,neck pillow,toddler pillow,knee pillow or other small pillow..