Hanna Andersson uses OEKO-TEX Standard 100 in all pajamas - baby pajamas, kids’ pajamas, and family pajamas. OEKO-TEX Standard 100 is a stringent certification used to identify those products that do not contain any harmful substances in any component. When you purchase an OEKO-TEX Standard 100 product from Hanna Andersson, you can be assured that you selected the best option for those in in your life who mean the most.