BAYPRET^® NANO PU is nano dispersion self-cross linking polyether polyurethane which is formaldehyde free and could be used on high value added finishing. It is a kind of multi-functional agent and able to improve the elasticity of the PA/EL fabric and the rubbing color fastness of the dyeing fabric. It also works on the anti-pilling finishing and has durable wrinkle free property. When used together with the resin, the product could save the strength loss, and enhance the washing durability of aroma finishing as well.