Vietnam Era 3rd Pattern Jungle Boots, with panama sole. made using blender and substance painter.
here are some of the references
https://thumbs.worthpoint.com/zoom/images2/1/1216/04/original-vietnam-issue-3rd-pattern_1_c57d0373e591ae6b71c760a349a5203c.jpg
https://www.mooremilitaria.com/combat-boots.html
https://cdn.discordapp.com/attachments/717805282516008973/723977168815915099/unknown.png