Fabric 96% polyester, 4% spandex TOG Rating None (77-78 degrees Fahrenheit) The Flying Squirrel pajamas double as a wearable blanket, keeping your little one cozy no matter how they toss and turn. Breathable fabric with gentle stretch Loose fit for plenty of room to grow Ribbed cuffs at wrists and ankles prevent hiking up during sleep Designed based on safe sleep recommendations from the American Academy of Pediatrics (AAP)