Board Thread:New on Bleach Wiki/@comment-27120311-20151025235010/@comment-26912075-20151026150626

I am not sure, becuase we have not seen it post-timeskip, so it is possible that like his shinigami powers he needs to train with the vizards again in order to bring the mask back. Although, he may still have it and does not want to use it for whatever reason.