3M™ Medipore™ Composite Dressing 3-1/2 X 4 Inch Rectangle Sterile Nonwoven Backing (315360_CS) 100/CS3M's Medipore +Pad soft cloth dressings are porous and breathable to maintain skin integrity. They have a nonadherent pad that won't unsettle the wound bed. 1 3 4 inch x 2 3 8 inch pads are absorbent to help maintain a proper healing environment. The adhesive on the white, 3 x 4 inch dressing is strong yet gentle on the skin. These Medipore island dressings conform around contours and flex with movement to provide optimal protection.