Shrinkies can be used with wefted, prebonded or synthetic bulk hair.

To remove Shrinkies heat them again with the heat clamp.
Slide extension hair and shrinkie off of the natural hair. Use acetone or sweet orange oil to remove Shrinkies residue.

Shrinkies starter kit includes:

1- Doctored Locks Heat Clamp
1 - Jar of Shrinkies
1 - XL Needle