Extended Wear of a Steel and a Teflon Insulin Infusion Set

Inclusion Criteria: * Clinical diagnosis of type 1 diabetes for at least 12 months * Using an insulin pump for at least 12 months * Age ≥18 years * Hemoglobin A1c level less than or equal to 8.5% * Willing to use mylife™ YpsoPump® system while they are participating in the study * Willing to use NovoRapid® insulin while they are participating in the study * An understanding of and willingness to follow the protocol and sign the informed consent Exclusion Criteria: * Diabetic ketoacidosis in the past 3 months prior to enrollment * Severe hypoglycemia resulting in seizure or loss of consciousness in the 3 months prior to enrollment * Urea, Creatinine, ALT more than three times the upper limit of normal, or thrombocytopenia (\<150 G/l) * Female subjects: pregnancy, lactation period, lack of a negative pregnancy test (except in case of menopause, sterilization or hysterectomy), or unwilling to use an acceptable form of contraception during the study (for sexually active subjects of childbearing potential) * Known severe tape reactions or allergies * Known severe nickel allergies * History of frequent catheter abscesses associated with pump therapy * Serious acute or chronic disease besides diabetes mellitus or an anamnesis which might, in the opinion of the investigator, pose a risk to the subject, e.g. seizure disorder, adrenal disorder, dialysis for renal failure, cystic fibrosis, active infection * Any incapacity or general condition that, in the opinion of the investigator, prevents adequate compliance with the study procedures, e.g. mental or visual incapacity, language barriers, alcohol or drug misuse * Dependency from the sponsor or the clinical investigator