Silicone wigs are a cross between a full lace wig and breathable silicone. Silicone is a stretchy material a little like a swimming cap, gripping the head without the need for glue or tape.
This type of wig is best suited to individuals with significant or total hair loss, as the silicone needs to make contact with the naked scalp in order to provide a secure hold.
Provided that it is a good fit, this type of wig only needs to be bonded where there is a lace edge.