Designation:F2732−16StandardPracticeforDeterminingtheTemperatureRatingsforColdWeatherProtectiveClothing1ThisstandardisissuedunderthefixeddesignationF2732;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONManufacturersofcoldweatherprotectiveclothingwantconsumerstobethermallycomfortablewhenwearingtheirproducts.Therefore,theywanttoindicatetheamountofwarmth(thatis,insulation)theirproductswillprovidetoconsumersatthepointofsale.Thisisoftenexpressedasatemperatureratingonproductlabelsandinproductdescriptionsincatalogs.Atemperatureratingiscommonlyunderstoodtomeanthelowestairtemperatureatwhichtheaverageadultpersonwillhaveanacceptablelevelofthermalcomfortwhenwearingtheproduct.Althoughitisnotalwaysstatedonlabelsorincatalogs,manufacturersareassumingthatconsumerswillweartheappropriateamountofclothingwiththecoldweathergarments.Heatedmanikinsareusedtomeasurethethermalresistance(insulation)andevaporativeresistanceofclothingensemblesinaccordancewithTestMethodsF1291andF2370,respectively.Thethermalinsulationvalueofacoldweatherprotectiveensembleareusedinheatlossmodelstoestimatethethermalcomfortofpeopleincoldenvironments.Thisapproachhasalreadybeenusedforsleepingbags(seeEN13537).1.Scope1.1Thisstandardpracticecoversthedeterminationofthetemperatureratingofcoldweatherprotectiveclothingen-sembles.Itinvolvesmeasuringthethermalresistance(insula-tion)valueofaclothingensemblewithaheatedmanikininaccordancewithTestMethodF1291andusingaheatlossmodeltopredictthelowestenvironmentaltemperatureforcomfort.1.2Thepredictivemodelusedinthisstandardestimatestheevaporativeheatlossfromapersonwearingcoldweatherclothingasopposedtomeasuringtheevaporativeresistanceonasweatingmanikin.Ifapersonisactiveandgetsoverheatedinacoldenvironment,he/sheisusuallyabletoadjustthegarmentsinordertodissipateexcessh...
