We evaluated use of interventions to prevent insect bites in Canadian personnel deployed to Kabul, Afghanistan. Data were collected through a self-report written survey. The response rate was 92%, and intervention uptake was 11% applied repellent that day, 21% slept under a bednet their last sleep, and 78% wore insecticide-treated clothing. Two associations were usually evident in multivariate analyses: persons perceiving risk of exposure as high were more likely to use bednets and repellent, and individuals reminded to use an intervention had higher odds of doing so. However, even if perception of exposure risk was high and reminders were received, the use of bednets (60%) and repellent (40%) was relatively low. Hence, on the one hand, increased uptake of interventions through targeted messaging might be possible. On the other hand, effectiveness of these interventions might be substantially constrained because of nonuse, even in a motivated and informed population.