What is Alfresco Alfresco is the only available moisturiser containing a natural insect repellant. It contains botanical extracts (Geranium, Lavender, Melissa) to repel insects without repelling humans. It is a natural insect repellent with a pleasant fragrance & is also a nourishing, effective moisturizer & skin conditioner. New! Alfresco has now launched its new fragrance Acqua D' Alfresco, the essential fragrant anti bug bite in an atomiser. Learn more. Product Testing Most synthetic insect repellants contain a chemical called Deet (diethyltoluamide) which can react badly on the skin as well as with some plastics (e.g. camera cases, spectacle frames, watch straps). Alfresco has been tested & proven an effective deterrent of mosquitoes by the School of Hygiene & Tropical Medicine, part of the University of London. Researcher, Nigel Hill, tests the product by placing his bare forearm in a cage full of mosquitoes & records their biting. Alfresco is tested on humans not animals.