Three controlled -release personal-use pulp fabric impregnated insect repellent formulations of 5% N, N-diethyl-3-methylbenzamide (DEET), and 10% and 15% neem oils were evaluated in an environmental chamber on volunteers for their repellent efficacy against three mosquito species, Culex pipiens pallens, Aedes aegypti and Ochlerotatus togoi. The 5% DEET formulation showed significant repellency in pulp fabric (5mm in width) against Culex pipiens pallens and Aedes aegypti (P＜0.05), providing an average repellency of 88.0%, 66.3%, and 46.8% of Cx. pipiens pallens, Ae. aegypti and O. togoi bites, respectively, during the 6 hours of exposure period. Against night-biting mosquitoes Cx. pipiens pallens, the DEET formulation provided mostly complete protection for at least 4 hours after the application. In pulp fabric of 10mm in width, the 5% deet formulation showed significantly the highest repellency among the repellents against O. togoi (P＜0.05), providing an average repellency of 52.3% during the 6 hours of exposure period. However, the pulp fabrics treated with 10% and 15% neem oil were less effective than 5% DEET against three mosquito species. This study demonstrated the potential of 5% DEET as pulp fabric repellent against both day- and night-biting mosquitoes.