Restore Calcium Alginate Dressing, Silver vs Aquacel Ag in the Treatment of Critically Colonized Venous Leg Ulcers

Inclusion Criteria: 1. Is 18 years or older; male or female. 2. Previous diagnosis of venous insufficiency proven by a positive venous duplex with reflux. 3. Has a venous ulcer with a wound area between 5 cm2 - 40 cm2. 4. Has an ankle brachial index (ABI) \>0.8. 5. Has a venous ulcer with duration less than 24 months. 6. Has a venous ulcer which is critically colonized (not infected) based on the Lazareth Study Model. Ulcers are considered to be critically colonized if at least three of the five following signs are present: Severe spontaneous pain between two dressing changes,Perilesional erythema,Local edema,Malodour,Heavy Exudation 7. Is currently using Profore as their standard of care. 8. Has not received antibiotics for 6 weeks prior to enrollment. Exclusion Criteria 1. Has an allergy to one of the components of the dressings (calcium alginate, hydrocolloid \[carboxymethylceullose\], silver). 2. Is currently on antibiotics. 3. Has a negative venous duplex. 4. Is unable to tolerate 4 layer compression. 5. Is unable to continue contact with the investigator for a period of at least two weeks. 6. Is unwilling or unable to comply with the study protocol.