The Boob tape is mainly made of elastic cotton cloth and glue.
The glue generally is Silicone glue or Acrylic glue. They are all medical grade Adhesive and mild and non-irritating to the skin.
Especially the silicone glue is more gentle and comfortable to the skin.
The viscosity of Boob tape is stronger enough for A-H cup. It can fix on breast well. At the meantime it doesn't hurt skin when tear off it.
Its air permeability and waterproofing are good for many scenes. Such as dress, bikini, wedding dress, etc.