The tray sleeves for U10 containers are made from FSC® certified paper From responsible sources and have no wax or plastic lining, making them naturally compostable. Great for takeout and grab-and-go meals, these compostable tray sleeves help keep food safe and containers closed during transportation. Fits TR-SC-U10, TR-SC-U10L-LF, TR-SC-U10T, TR-SC-U10TL-LF.