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Adhesive hydrocolloid matrix and the outer film on DuoDerm Signal dressing are permeable by moisture vapor.. Provides an occlusive barrier against bacteria, viruses, dirt and water. 10 x 10 centimeters.
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![ConvaTec - Hydrocolloid Dressing DuoDERM® Signal® CGF® Foam Backing 4 X 4 Inch Square Hydrocolloid [5/BX]](http://everydaysupplyco.com/cdn/shop/files/a05639c5dfa41bb61a9f07d31c17baf6220a686e.jpg?v=1742838786&width=2000)
![ConvaTec - Hydrocolloid Dressing DuoDERM® Signal® CGF® Foam Backing 4 X 4 Inch Square Hydrocolloid [5/BX]](http://everydaysupplyco.com/cdn/shop/files/a05639c5dfa41bb61a9f07d31c17baf6220a686e_1024x.jpg?v=1742838786)