Safe And Sound Health’S Blue Detectable Plasters Are Ideal For People Working Within Food Catering Industries Or With Food. Each Plaster Has A Metal Strip Behind The Wound Pad, Making Them Easy To Identify With A Metal Detector. Our Highly Visible Blue Plasters Are Breathable And Water-Resistant, Stretching And Contouring With The Skin’S Movements, Protecting Cuts And Grazes Even In Wet Conditions. The Non-Stick Wound Pad Helps To Create An Ideal Healing Environment That Promotes Faster Natural Healing While Also Protecting And Cushioning The Wound.