TPU-LW is the TPU material can be foamed during the printing process. By adjusting the printing temperature and speed, the foaming degree of the filament can be changed, so that the strength and density of the printed product can be adjusted in a personalized way. Foaming during the printing process makes the surface of the product has a fine frosted texture, and not easy to show the layer pattern. TPU-LW has good flexibility, hard to tear, and has good resilience. As a flexible foam material, the printed object is soft and skin-friendly, suitable for flexible wearable products and COSPLAY model printing.