Study to Evaluate the Performance of a New 2-piece Ostomy Appliance vs. Flexima® 3S in Patients With Enterostomy

Inclusion Criteria: * patient having a colostomy or an ileostomy for at least 1 month * patient currently using a flat appliance * patient wearing his appliance, on average, at least 5 days * patient with a stoma's diameter less than 65 mm * patient who agrees to participate in the evaluation and who have signed the inform consent * patient having a mental capacity to participate to the study (i.e. to understand the study and to answer to the questions) Exclusion Criteria: * Patient currently suffering from peristomal skin complications (bleeding or red and broken skin at the time of inclusion) * Patient receiving or having received, within the last month, chemotherapy or corticotherapy * Patient already participating in another clinical study or who have previously participated in this investigation * Pregnant or breast-feeding woman