McKesson Xeroform Petrolatum Gauze Dressings contain 3% Bismuth Tribromophenate to provide bacteriostatic properties and help to reduce risk of infection and deodorize the wound. A Xeroform Gauze Dressing help maintain a mosit wound healing environment to assist in autolytic debridement. Ideal as a primary dressing for wounds with light or no exudate. Latex Free. Available in 4 sizes.