Our Soft Gel Press Ons are made of MABS (Methyl Methacrylate-Acrylonitrile-Butadiene-Styrene Copolymer). This is a durable plastic that differs from traditional acrylates and is generally well tolerated. However, since methyl methacrylate (MMA) is used in the production process, it may, in rare cases, contain traces that could trigger a reaction in very sensitive individuals. I recommend checking this with your doctor in advance to be absolutely certain. It is also possible that people with allergies may react to other ingredients in nail products.