Because the MaleEdge extender uses the penis traction method to enlarge your penis, you don’t need to be concerned about having an allergic reaction at all. We use only the finest quality 100% medical grade materials in our production process. The materials we use to produce our MaleEdge penis extender are lightweight, hypoallergenic and easy to use. See our Clinically Tested Device. Any adverse skin reactions you may have had from using another penis traction device on the market may be due to the manufacturers using low quality materials.