How do I merge animated skinned meshes to reduce draw calls?

I'm sorry for my English. My game in unity about character whom can change clothes: shoes, hat, dress,... Every parts make 1 Draw Call to use because every parts are GameObjects, the character result make 6 Draw Call, I want to merge them to reduce the drawcall, I can't use "Combine children" beacause it's only working with no animation. So what should i do for my purpose. Please help me and thanks for your watching