The models were created in Marvelous Designer, the avatars come with texture and each of them has a different size (XS, S, M,L). Each size has a separate .zprj file (Marvelous Designer project file), which allows you edit the clothing or to create new clothing to fit on the avatar, and also an .obj file which allows you to import the models in any desired software. If you have any question or need a further clarification do not hesitate to contact me.