The STAHLS Heat Transfer Vinyls that we supply are designed to outlast the garment, and our most popular T-Shirt Vinyl, Stretchable HTV Vinyl and Glitter Heat Transfer Vinyl (HTV) have all been tested to show that they’ll last for a minimum of 50 washes. All three of these HTVs are also OEKO-TEX Standard 100-certified to give you the confidence of knowing that they don't contain harmful substances.