The power suit of the under - ones 100% combed cotton rub, OEKO-Tex Standard 100 certified Snap closure at bottom What is OEKO-Tex? The goal of OEKO-TEX Standard 100 is to ensure that fabrics pose no risk to human health and have a skin-friendly pH level to ensure against skin irritation. OEKO-TEX Standard 100 certification means that our fabrics have been tested for over 300 chemicals in accordance with legal regulations (such as banned azo dyes, formaldehyde, pentachlorophenol, pesticides, cadmium and nickel) and US Consumer Product Safety Improvement Act (CPSIA) requirements regarding lead and harmful chemicals.