Assessment of Efficacy & Safety for a New Wound Dressing Urgo 310 3166 in the Local Treatment of VLU or Mixed Leg Ulcers

Inclusion Criteria: * Patient over 18 years old who has provided his/her written informed consent, * Patient who can be monitored by the same investigation team throughout the whole duration of the study, * Patient who agrees to wear an effective venous compression system every day, associated with the trial dressing, * Leg ulcer with an Ankle Brachial Pressure Index (ABPI) not less than 0.7 and not more than 1.3, * Ulcer area \> or equal to 5cm2, * Ulcer duration \> or equal to 6 months, * Ulcer presenting a the surface wound bed covered with 50% or more by sloughy tissue, * Moderately or heavily exudative ulcers. Exclusion Criteria: * Clinical infection on the wound bed.