A fabric protectant comprising a cellulosic material having a bulk density of 0.2 to 0.7 g/cm3 and a thickness of 0.1 to 4 mm and a composition containing as an active ingredient 2,3,5,6-tetrafluorobenzyl (+)-1R,trans-2,2-dimethyl-3-(2,2-dichlorovinyl)cyclo-propanecarboxylate, said cellulosic material having the composition supported thereon or being impregnated with the composition, which maintains a stable attack-preventing effect over a long period of time.