Bộ các bản vá có thể in 3D

Set of 3D printable patches (82 mm diameter, and 82 mm square) to be sew with velcro strip, and then attached to backpacks, gears, whatever you want. 

Tested with 0.5 mm nozzle and 0.25 mm layer height. No problems with small details, printed in PETG for little bit of flexibility (you don't want your patch to strip of because it can bend and adjust like material one).

.step files of blank square and round patches added for posible modifications and remixes.