Hydrofera BLUE® Classic 4 X 4 X 1/2 Inch Heavy DrainageDescription Reference: HBHD4450 Non Bordered Size: 4" x 4" x 1 2" Thick Box of 5 Features A foam dressing containing two pigments, methylene blue and gentian violet, in open celled polyvinyl alcohol (PVA) Broad spectrum antibacterial protection Rapid wicking and exudate retention Assists in autolytic debridement Non cytotoxic Helps maintain a moist wound environment Heavy drainage dressing