Unreal Engine:

• Supported versions 4.18.3+
  -One material M_PunkBoot plus two material instances MI_PunkBoot_Inst
  and MI_PunkBoot_Barbie_Inst which allow fast color change
  -Each of the material instances has a unique ID mask to change colors
  -Material instances have adjustable roughness, metallic and normal map intensity
  -The texture resolution used is 2K

General:

• 4K PBR textures
  Blender has resources packed
  Separate triangulated FBX and OBJ files
  FBX and OBJ consist of one boot
  Interior polygons are removed
  Two texture folders, one with 4K and the second with 4&2K resoutions for Unreal
  Model has no rig

Textures:
∙ BaseColor
∙ Metallic
∙ Roughness
∙ Normal Map
∙ AO
∙ ID

Mesh (one boot):
with/without chain
∙Vertices - 18 204 / 6 200
∙Edges - 35 892 / 11 894
∙Polygons - 17 688 / 5 696
∙Triangles - 35 176 / 11 228

Dimensions:
∙X 0.121m
∙Y 0.284m
∙Z 0.731m

Note:
To install package to Unreal Engine drag and drop it into your project content folder
In case you have missing textures in materials in Unreal
drag and drop an entire package and then remove unnecessary folders (Demo)

If you have any questions, feel free to ask. I'll be glad to answer