Repalfly ORIGINAL (green cap) will appeal to anyone interested in 'natural' products. Oil of Citronella is the active ingredient and is extracted using steam distillation from an Asian grass. It is less chemically active than DEET.
Repalfly SPECIAL (blue or orange cap) uses DEET as the active ingredient. We use DEET as it is very effective at repelling insects. As with many man-made chemicals there are concerns about its safety particularily for children. We use a lower concentration of 15%, rather than the allowable 30%. At this concentration, it is still very effective and is less likely to cause irritation..