Effective preparations for blackflies that we offer are proven and valued for their effectiveness. Their formula is based on natural plant extracts and other active substances that repel these insects. Our range includes products with varying concentrations of DEET, or substrates such as geraniol, or IR3535 that actively work to repel blackflies and discourage their persistent bite attempts. These remedies work especially well in open spaces while at bodies of water, in the woods, and in the garden. They don’t stain clothes, and depending on the formulation and how it’s applied – can be applied directly to skin exposed to bites.