Teflon EcoElite fabric protector Core-spun thread for stronger seams Get ahead of the class with our Girls' Panel Pleated School Skirt. Made for comfort, the tri-blend fabric has just the right amount of stretch. With core-spun thread for stronger seams, this skirt can take anything the day can throw at it. Good to know: Age 4-11 years comes with an elasticated waist. Age 12+ does not have an elasticated waist.