Some of the meshes use double shader(included) for display two-sided polygons. Custom hair shader included.
Please read the description of each product from the pack on separate pages. The links:
Zombiee1
https://assetstore.unity.com/packages/slug/271217
Zombie2
https://assetstore.unity.com/packages/slug/279791
Zombiee3
https://assetstore.unity.com/packages/slug/310261
Zombie 4
https://assetstore.unity.com/packages/slug/315568
Technical details:
Several assets collected in one package. Suitable for any project. Please read the descriptions of each the asset respect its page, the links are above.