A number of consumer products and surface materials contain softening agents, so called plasticizers, to make the material flexible. Such materials are known to provoke allergic reaction or even carcinogenic. The softening agents are mainly used in PVC. Because the Accu-Chek infusion sets are free of PVC we can exclude the content of plasticizers, especially DEHP [di(2-ethylhexyl)-phthalate] and DBP [dibutyl-phthalate].