If you define 'natural' as ‘free of chemicals and other artificial products that permanently alter the natural structure of the hair’, then look no further than the SimiWeave™! Forget all your preconceptions of the word 'weave' and think of the SimiWeave™ simply as a ‘protective hairstyle’’: it uses a wig cap that covers and protects @90% of your hair!
The SimiWeave™ is temporarily and gently attached using combs/clips, and it is not permanently fixed using damaging thread or glue like traditional weaves! You can remove it easily to let your hair breath, and to wash and care for your hair. And if you corn-row your hair to get it really flat, you could be accelerating its rate of growth too.
If, however, you define 'natural' as bereft of any hair attachments or other coverings’ then the SimiWeave™ is unlikely to be of interest.