Prototype polishes are limited edition polishes that are similar or slightly different from the standard collections. Some may have a little to much of an ingredient. Some may have not enough of an ingredient. For whatever the reason, these polishes did not fit into a main collection. However, they are all handcrafted with the same 10 Free, Vegan, and Cruelty Free standards, as all of the other polishes. These polishes will not be restocked when sold out.