EVABarrier tubing is the essential tubing choice for use with our new line of Duotight fittings. EVA barrier tubing has been engineered with protection in mind and is both PVC free and BPA free. With a double walled designed, the outer barrier is stiffer to reduce kinking and to accommodate push-in fittings, while the outer layer is a barrier to oxygen to reduce the threat of oxidation and to allow CO2 in.