About this 3D model

Summary Avoid ear pain caused by prolonged wearing of masks It is recommended to use nylon filament and print with a thickness of 0.6mm More Printing Photos: http://mingshiuan.blogspot.com/2020/03/202003060313-3d1-2-123d-design.html?m=0#Nylon 3D printing nylon dyeing mask decompression belt